From denisburchill at yahoo.com.au Wed Jun 11 19:31:47 2008 From: denisburchill at yahoo.com.au (Denis Burchill) Date: Wed, 11 Jun 2008 16:31:47 -0700 (PDT) Subject: Physics DVD in latest COSMOS Magazine Message-ID: <188208.69793.qm@web55911.mail.re3.yahoo.com> The June/July issue of COSMOS magazine (NZ$9.90) has a great DVD freebee titled: "Australian multimedia for physics students: Short videos on a range of topics: from astrophysics and medicine to motors and optics." and is produced by the School of Physics at the University of Sydney. Cheers, Denis. Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/mail -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080611/31792318/attachment.html From denisburchill at yahoo.com.au Wed Jun 11 20:45:31 2008 From: denisburchill at yahoo.com.au (Denis Burchill) Date: Wed, 11 Jun 2008 17:45:31 -0700 (PDT) Subject: Discovery of the memristor - postulated 37 years ago by Leon Chua Message-ID: <365785.66665.qm@web55910.mail.re3.yahoo.com> Hi all, Have you come across the article on the memristor at http://www.spectrum.ieee.org/may08/6207 This looks pretty fundamental and will have far reaching effects in technology. It's new material for our Year 13 physics (and textbooks). Who's going to decide on its symbol and the name of its unit of measurement? Cheers, Denis. Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/mail -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080611/990e73df/attachment.html From sjohn at diocesan.school.nz Wed Jun 11 23:57:39 2008 From: sjohn at diocesan.school.nz (Susan John) Date: Thu, 12 Jun 2008 15:57:39 +1200 Subject: Beats and oscilloscopes In-Reply-To: <188208.69793.qm@web55911.mail.re3.yahoo.com> References: <188208.69793.qm@web55911.mail.re3.yahoo.com> Message-ID: Thank you for that Dennis. I was wondering if anyone has tried to demonstrate beats using an oscilloscope and a couple of tuning forks. Even though I can hear the beats clearly, I do not seem to get the display the way I would like to. Perhaps it is because I am using just one microphone. Any suggestions would be more than welcome. Many thanks Cheers Susan From: phys-teach-talk-bounces at nzip.org.nz [mailto:phys-teach-talk-bounces at nzip.org.nz] On Behalf Of Denis Burchill Sent: Thursday, 12 June 2008 11:32 a.m. To: phys-teach-talk at nzip.org.nz Subject: Physics DVD in latest COSMOS Magazine The June/July issue of COSMOS magazine (NZ$9.90) has a great DVD freebee titled: "Australian multimedia for physics students: Short videos on a range of topics: from astrophysics and medicine to motors and optics." and is produced by the School of Physics at the University of Sydney. Cheers, Denis. ________________________________ Get the name you always wanted with the new y7mail email address . CAUTION: The information contained in this email is confidential and may be legally privileged. If the reader of this message is not the intended recipient you are hereby notified that any use, dissemination, distribution, or reproduction of this message is prohibited. Thank you. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080612/f19d2d04/attachment.html From jgladwyn at xtra.co.nz Thu Jun 12 05:59:13 2008 From: jgladwyn at xtra.co.nz (Joan Gladwyn) Date: Thu, 12 Jun 2008 21:59:13 +1200 Subject: Beats and oscilloscopes In-Reply-To: References: <188208.69793.qm@web55911.mail.re3.yahoo.com> Message-ID: <0abecc882203528a6dac1494a7d55f42@xtra.co.nz> Have you tried it using the free software, Audacity from sourceforge? (http://audacity.sourceforge.net/) You ditch the CRO and record the sound straight onto the computer then you can see the waveform. I haven't tried it for beats but it works for every other sound experiment I've tried. Joan Gladwyn On 12 Jun 2008, at 15:57, Susan John wrote: > Thank you for that Dennis. > ? > I was wondering if anyone has tried to demonstrate beats using an > oscilloscope and a couple of tuning forks. Even though I can hear the > beats clearly, I do not seem to get the display the way I would like > to. Perhaps it is because I am using just one microphone. Any > suggestions would be more than welcome. > Many thanks > ? > Cheers > Susan > ? > From: phys-teach-talk-bounces at nzip.org.nz > [mailto:phys-teach-talk-bounces at nzip.org.nz] On Behalf Of Denis > Burchill > Sent: Thursday, 12 June 2008 11:32 a.m. > To: phys-teach-talk at nzip.org.nz > Subject: Physics DVD in latest COSMOS Magazine > ? > The June/July issue of COSMOS magazine (NZ$9.90) has a great DVD > freebee titled: "Australian multimedia for physics students: Short > videos on a range of topics: from astrophysics and medicine to motors > and optics." and is produced by the School of Physics at the > University of Sydney. > > Cheers, > Denis. > ? > Get the name you always wanted with the new y7mail email address. > > CAUTION: The information contained in this email is confidential and > may be legally privileged. If the reader of this message is not the > intended recipient you are hereby notified that any use, > dissemination, distribution, or reproduction of this message is > prohibited. Thank you. > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz From denisburchill at yahoo.com.au Thu Jun 12 23:48:34 2008 From: denisburchill at yahoo.com.au (Denis Burchill) Date: Thu, 12 Jun 2008 20:48:34 -0700 (PDT) Subject: DVD in COSMOS magazine Message-ID: <322796.69018.qm@web55907.mail.re3.yahoo.com> Hi all, Keith Irvine and Terry Moffat have both emailed me saying that there is no DVD in the latest issue. I've checked both the latest and the one before that and there is no mention of the DVD in either. The problem is that the DVD itself does not have an issue number or month on it. The April/May issue in 2007 had a DVD and there was mention of it on the front cover. Anyway, this morning I emailed COSMOS and asked which issue contained the DVD. I'm still waiting for a reply. I think anyway I'll contact the University of Sydney to see if we can get a 'job lot' of the DVDs from them. It's a great DVD - somewhat like John Campbell's one. Cheers, Denis. Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/mail -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080612/4f1a9279/attachment.html From jwatson at stbedes.school.nz Sun Jun 15 19:28:36 2008 From: jwatson at stbedes.school.nz (John Watson) Date: Mon, 16 Jun 2008 11:28:36 +1200 Subject: Phys-teach-talk Digest, Vol 6, Issue 2 References: Message-ID: <001901c8cf3f$88ba0200$8c97a8c0@stbedes.school.nz> Hi Denis mentioned John Campbell's DVD. I fondly remember his lectures when I was a student but I have not heard of his DVD. Where can I find some more info on this? Thanks John Watson St Bede's College ----- Original Message ----- From: To: Sent: Saturday, June 14, 2008 4:00 AM Subject: Phys-teach-talk Digest, Vol 6, Issue 2 > Send Phys-teach-talk mailing list submissions to > phys-teach-talk at nzip.org.nz > > To subscribe or unsubscribe via the World Wide Web, visit > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > or, via email, send a message with subject or body 'help' to > phys-teach-talk-request at nzip.org.nz > > You can reach the person managing the list at > phys-teach-talk-owner at nzip.org.nz > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Phys-teach-talk digest..." > > > Today's Topics: > > 1. DVD in COSMOS magazine (Denis Burchill) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 12 Jun 2008 20:48:34 -0700 (PDT) > From: Denis Burchill > Subject: DVD in COSMOS magazine > To: phys-teach-talk at nzip.org.nz > Message-ID: <322796.69018.qm at web55907.mail.re3.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Hi all, > > Keith Irvine and Terry Moffat have both emailed me saying that there is no > DVD in the latest issue. I've checked both the latest and the one before > that and there is no mention of the DVD in either. The problem is that the > DVD itself does not have an issue number or month on it. The April/May > issue in 2007 had a DVD and there was mention of it on the front cover. > > Anyway, this morning I emailed COSMOS and asked which issue contained the > DVD. I'm still waiting for a reply. > > I think anyway I'll contact the University of Sydney to see if we can get > a 'job lot' of the DVDs from them. > > It's a great DVD - somewhat like John Campbell's one. > > Cheers, > Denis. > > > > Get the name you always wanted with the new y7mail email address. > www.yahoo7.com.au/mail > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080612/4f1a9279/attachment-0001.html > > ------------------------------ > > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > > > End of Phys-teach-talk Digest, Vol 6, Issue 2 > ********************************************* > From gbatch at clear.net.nz Mon Jun 16 04:18:36 2008 From: gbatch at clear.net.nz (Graham Batchelor) Date: Mon, 16 Jun 2008 20:18:36 +1200 Subject: Phys-teach-talk Digest, Vol 6, Issue 2 In-Reply-To: <001901c8cf3f$88ba0200$8c97a8c0@stbedes.school.nz> References: <001901c8cf3f$88ba0200$8c97a8c0@stbedes.school.nz> Message-ID: <002501c8cf89$93ab37c0$bb01a740$@net.nz> John Campbell will have a few of them - give him a call or email. By the way have all you guys had a look at the PHET web site. Fantastic simulations and all for free from Colorado. Just do a search for PHET. They can be run on the web or downloaded to your computer. Batch -----Original Message----- From: phys-teach-talk-bounces at nzip.org.nz [mailto:phys-teach-talk-bounces at nzip.org.nz] On Behalf Of John Watson Sent: Monday, 16 June 2008 11:29 a.m. To: phys-teach-talk at nzip.org.nz Subject: Re: Phys-teach-talk Digest, Vol 6, Issue 2 Hi Denis mentioned John Campbell's DVD. I fondly remember his lectures when I was a student but I have not heard of his DVD. Where can I find some more info on this? Thanks John Watson St Bede's College ----- Original Message ----- From: To: Sent: Saturday, June 14, 2008 4:00 AM Subject: Phys-teach-talk Digest, Vol 6, Issue 2 > Send Phys-teach-talk mailing list submissions to > phys-teach-talk at nzip.org.nz > > To subscribe or unsubscribe via the World Wide Web, visit > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > or, via email, send a message with subject or body 'help' to > phys-teach-talk-request at nzip.org.nz > > You can reach the person managing the list at > phys-teach-talk-owner at nzip.org.nz > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Phys-teach-talk digest..." > > > Today's Topics: > > 1. DVD in COSMOS magazine (Denis Burchill) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 12 Jun 2008 20:48:34 -0700 (PDT) > From: Denis Burchill > Subject: DVD in COSMOS magazine > To: phys-teach-talk at nzip.org.nz > Message-ID: <322796.69018.qm at web55907.mail.re3.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Hi all, > > Keith Irvine and Terry Moffat have both emailed me saying that there is no > DVD in the latest issue. I've checked both the latest and the one before > that and there is no mention of the DVD in either. The problem is that the > DVD itself does not have an issue number or month on it. The April/May > issue in 2007 had a DVD and there was mention of it on the front cover. > > Anyway, this morning I emailed COSMOS and asked which issue contained the > DVD. I'm still waiting for a reply. > > I think anyway I'll contact the University of Sydney to see if we can get > a 'job lot' of the DVDs from them. > > It's a great DVD - somewhat like John Campbell's one. > > Cheers, > Denis. > > > > Get the name you always wanted with the new y7mail email address. > www.yahoo7.com.au/mail > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/2008061 2/4f1a9279/attachment-0001.html > > ------------------------------ > > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > > > End of Phys-teach-talk Digest, Vol 6, Issue 2 > ********************************************* > _______________________________________________ Phys-teach-talk mailing list Phys-teach-talk at nzip.org.nz http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.3.0/1503 - Release Date: 14/06/2008 6:02 p.m. From denisburchill at yahoo.com.au Mon Jun 16 15:15:57 2008 From: denisburchill at yahoo.com.au (Denis Burchill) Date: Mon, 16 Jun 2008 12:15:57 -0700 (PDT) Subject: COSMOS Physics video clips Message-ID: <233837.7827.qm@web55909.mail.re3.yahoo.com> Hi All, still no answer from COSMOS magazine but I have found the website associated with the video. It is called AMPS - Australian Multimedia for Physics Students at http://www.hscphysics.edu.au/home All the video clips (and lesson plans and other website links) are there for streaming or for downloading in wmv format. Just click the Resources link. Cheers, Denis. Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/mail -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080616/ef8f761b/attachment.html From loneill at jameshargest.school.nz Mon Jun 16 16:23:15 2008 From: loneill at jameshargest.school.nz (loneill) Date: Tue, 17 Jun 2008 08:23:15 +1200 Subject: COSMOS Physics video clips In-Reply-To: <233837.7827.qm@web55909.mail.re3.yahoo.com> Message-ID: Hi all We got a copy of the CD in the June/July 2008 issue of the magazine. Lee O'Neill James Hargest _____ From: phys-teach-talk-bounces at nzip.org.nz [mailto:phys-teach-talk-bounces at nzip.org.nz] On Behalf Of Denis Burchill Sent: Tuesday, 17 June 2008 7:16 a.m. To: phys-teach-talk at nzip.org.nz Subject: COSMOS Physics video clips Hi All, still no answer from COSMOS magazine but I have found the website associated with the video. It is called AMPS - Australian Multimedia for Physics Students at http://www.hscphysics.edu.au/home All the video clips (and lesson plans and other website links) are there for streaming or for downloading in wmv format. Just click the Resources link. Cheers, Denis. _____ Get the name you always wanted with the new y7mail email address . -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080617/4f3e798c/attachment.html From physics at kingsway.school.nz Mon Jun 16 23:10:06 2008 From: physics at kingsway.school.nz (Sean Cleary) Date: Tue, 17 Jun 2008 15:10:06 +1200 Subject: PHET In-Reply-To: <002501c8cf89$93ab37c0$bb01a740$@net.nz> Message-ID: In case anyone hasn't followed up on Batch's comment below, go there. Now. The address is http://phet.colorado.edu/new/get_phet/index.php. I have just downloaded some and they are quite (excuse the non-blokey word here) lovely. Clean, elegant and user friendly (still struggling with the laser one but I am gummed up with a cold and high on report-induced lack of sleep :-)). One of the better simulation sites I have seen and they give them away for free! Made my afternoon! Thanks Batch. Sean Cleary KingsWay School By the way have all you guys had a look at the PHET web site. Fantastic simulations and all for free from Colorado. Just do a search for PHET. They can be run on the web or downloaded to your computer. Batch From g.foster at clear.net.nz Wed Jun 18 02:40:53 2008 From: g.foster at clear.net.nz (g.foster) Date: Wed, 18 Jun 2008 18:40:53 +1200 Subject: Pressure at nodes and antinodes Message-ID: <4858adf5.c.1cad.20858@clear.net.nz> Greetings Fellow Physies We have just made a long metallic tube with a loud speaker at one end and gas entry at the other. This enables us to light the gas which comes through 1 mm holes 1.0 cm apart and to produce single frequency sound at the other. The flame pattern at resonance is one where we see high flames at the antinodes and small flames at the nodes. Many of you will have seen similar appartaus in photos. However we are discussing why we get high and low flames and we would appreciate clarification. If the high flames are at the antinode this is where there is maximum variation in gas pressure, so sometimes there is low pressure and at other times a higher pressure than normal. At the nodes the gas pressure remains constant at normal pressure and we think that is where we get lower flames. Question: Is a high flame produced at the antinode? Our reasoning: For at least half the time there is higher pressure than 'normal'? Since the frquency for the best effect seems to be 1 kHz to 2 kHz this would imply that there is higher than usual gas pressure for at least 50% of the time and this pushes more gas out the holes. Comments please. Thanks Graham Foster EGGS Auckland Graham Foster Director of Science, EGGS AMI Learned Society From dhousden at xtra.co.nz Wed Jun 18 05:54:08 2008 From: dhousden at xtra.co.nz (David Housden) Date: Wed, 18 Jun 2008 21:54:08 +1200 Subject: Pressure at nodes and antinodes In-Reply-To: <4858adf5.c.1cad.20858@clear.net.nz> References: <4858adf5.c.1cad.20858@clear.net.nz> Message-ID: <00d401c8d129$40c3d7a0$c24b86e0$@co.nz> Hi Graham An analysis of the Ruben's tube was published some time ago in AJP (1983). Howard Lukefahr and John Hannah's site (www.physics.school.nz) make reference to this on http://www.vuw.ac.nz/scps-demos/demos/Light_and_Waves/SoundFlames/SoundFlame s.htm The AJP paper says that both situations can occur depending on sound intensity and gas flow. Cheers David Housden -----Original Message----- From: phys-teach-talk-bounces at nzip.org.nz [mailto:phys-teach-talk-bounces at nzip.org.nz] On Behalf Of g.foster Sent: Wednesday, 18 June 2008 6:41 p.m. To: Phys-teach-talk at nzip.org.nz Subject: Pressure at nodes and antinodes Greetings Fellow Physies We have just made a long metallic tube with a loud speaker at one end and gas entry at the other. This enables us to light the gas which comes through 1 mm holes 1.0 cm apart and to produce single frequency sound at the other. The flame pattern at resonance is one where we see high flames at the antinodes and small flames at the nodes. Many of you will have seen similar appartaus in photos. However we are discussing why we get high and low flames and we would appreciate clarification. If the high flames are at the antinode this is where there is maximum variation in gas pressure, so sometimes there is low pressure and at other times a higher pressure than normal. At the nodes the gas pressure remains constant at normal pressure and we think that is where we get lower flames. Question: Is a high flame produced at the antinode? Our reasoning: For at least half the time there is higher pressure than 'normal'? Since the frquency for the best effect seems to be 1 kHz to 2 kHz this would imply that there is higher than usual gas pressure for at least 50% of the time and this pushes more gas out the holes. Comments please. Thanks Graham Foster EGGS Auckland Graham Foster Director of Science, EGGS AMI Learned Society _______________________________________________ Phys-teach-talk mailing list Phys-teach-talk at nzip.org.nz http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.4.0/1506 - Release Date: 17/06/2008 4:30 p.m. From dking at christscollege.com Wed Jun 18 06:02:11 2008 From: dking at christscollege.com (David King) Date: Wed, 18 Jun 2008 22:02:11 +1200 Subject: Fwd: Pressure at nodes and antinodes References: Message-ID: > > Graham, > > I too had been asked this question a while ago, but as I didn't > know and I didn't have one I forgot all about it. > > The following website, if correct, says you are right or wrong > depending on the pressure itself: > > http://www.fysikbasen.dk/English.php?page=Vis&id=6 > > At the bottom of the article are some references -sadly the one > that looks most likely to explain the answer in detail is on the > aapt site and as I am not a member, I can't read it! > > Sorry > > > David King > Physics HoD > Christ's College > Private Bag 4900 > Christchurch > New Zealand > > > > > On 18/06/2008, at 6:40 PM, g.foster at clear.net.nz wrote: > >> Greetings Fellow Physies >> We have just made a long metallic tube with a loud speaker >> at one end and gas entry at the other. This enables us to >> light the gas which comes through 1 mm holes 1.0 cm apart >> and to produce single frequency sound at the other. The >> flame pattern at resonance is one where we see high flames >> at the antinodes and small flames at the nodes. Many of you >> will have seen similar appartaus in photos. >> However we are discussing why we get high and low flames and >> we would appreciate clarification. If the high flames are at >> the antinode this is where there is maximum variation in gas >> pressure, so sometimes there is low pressure and at other >> times a higher pressure than normal. At the nodes the gas >> pressure remains constant at normal pressure and we think >> that is where we get lower flames. >> Question: Is a high flame produced at the antinode? >> Our reasoning: >> For at least half the time there is higher pressure than >> 'normal'? Since the frquency for the best effect seems to be >> 1 kHz to 2 kHz this would imply that there is higher than >> usual gas pressure for at least 50% of the time and this >> pushes more gas out the holes. >> Comments please. >> >> Thanks >> Graham Foster >> EGGS Auckland >> >> Graham Foster >> Director of Science, EGGS >> AMI Learned Society >> >> _______________________________________________ >> Phys-teach-talk mailing list >> Phys-teach-talk at nzip.org.nz >> http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080618/9fc6fcbc/attachment.html From dking at christscollege.com Sun Jun 22 04:58:31 2008 From: dking at christscollege.com (David King) Date: Sun, 22 Jun 2008 20:58:31 +1200 Subject: Physics Entry Requirements Message-ID: <63DFE90C-75A5-4AF8-B468-62B071E29F4E@christscollege.com> Just wondering... What entry requirements do others have for pupils moving either from Level 1 Science or Physics to Level 2 Physics and From Level 2 Physics to Level 3 Physics At the moment we have no specific requirement for entry into these courses in terms of grades or credits obtained, but I remember from a cluster group meeting someone saying pupils required at least one 'M' grade in a standard to progress to the next level. Cheers David King Physics HoD Christ's College Private Bag 4900 Christchurch New Zealand -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080622/d21c7926/attachment.html From jwatson at stbedes.school.nz Sun Jun 22 17:06:02 2008 From: jwatson at stbedes.school.nz (John Watson) Date: Mon, 23 Jun 2008 09:06:02 +1200 Subject: Entry requirements for NCEA physics References: Message-ID: <000a01c8d4ab$c70419d0$3b97a8c0@stbedes.school.nz> David We have no requirements moving from L1 physics to L2, but those that only take L1 Science must pass 16 credits in both science and maths and they must include both algebra and a merit in science 1.6 (physics). We usually let them in if they only get an A but it doesn't hurt to try and push them! At present moving from L2 to L3 requires 16 credits in both maths and physics, but we are thinking about increasing that to 18 credits and/or perhaps including a merit. We are finding those with only 16 credits at A level are not well enough prepared for L3. John Watson St Bede's College ----- Original Message ----- From: To: Sent: Monday, June 23, 2008 4:00 AM Subject: Phys-teach-talk Digest, Vol 6, Issue 6 > Send Phys-teach-talk mailing list submissions to > phys-teach-talk at nzip.org.nz > > To subscribe or unsubscribe via the World Wide Web, visit > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > or, via email, send a message with subject or body 'help' to > phys-teach-talk-request at nzip.org.nz > > You can reach the person managing the list at > phys-teach-talk-owner at nzip.org.nz > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Phys-teach-talk digest..." > > > Today's Topics: > > 1. Physics Entry Requirements (David King) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 22 Jun 2008 20:58:31 +1200 > From: David King > Subject: Physics Entry Requirements > To: PHYSICS TALK > Message-ID: <63DFE90C-75A5-4AF8-B468-62B071E29F4E at christscollege.com> > Content-Type: text/plain; charset="us-ascii" > > Just wondering... > > What entry requirements do others have for pupils moving either > > from Level 1 Science or Physics to Level 2 Physics > > and > > From Level 2 Physics to Level 3 Physics > > At the moment we have no specific requirement for entry into these > courses in terms of grades or credits obtained, > > but I remember from a cluster group meeting someone saying pupils > required at least one 'M' grade in a standard to progress to the next > level. > > Cheers > > > > David King > Physics HoD > Christ's College > Private Bag 4900 > Christchurch > New Zealand > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080622/d21c7926/attachment-0001.html > > ------------------------------ > > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > > > End of Phys-teach-talk Digest, Vol 6, Issue 6 > ********************************************* > From parkerprice at clear.net.nz Mon Jun 23 04:00:37 2008 From: parkerprice at clear.net.nz (Kerry Parker and Andy Price) Date: Mon, 23 Jun 2008 20:00:37 +1200 Subject: Entry requirements for NCEA physics In-Reply-To: <000a01c8d4ab$c70419d0$3b97a8c0@stbedes.school.nz> References: <000a01c8d4ab$c70419d0$3b97a8c0@stbedes.school.nz> Message-ID: <8B06AE856BEF46D0A1B014B9CA0C00C8@study> A couple of years ago at Auckland Girls' I did some small, statistically insignificant analysis of success at level 2 based on level 1 results . The correleation was greatest between success at level 2 and success in level 1 maths - particularly the algebra and the graphing externals. Students with algebra and graphing skills romped through level 2 Physics. Students with good physics concepts but bad maths fell over. Kerry Kerry Parker The Correspondence School ----- Original Message ----- From: "John Watson" To: Sent: Monday, June 23, 2008 9:06 AM Subject: Re: Entry requirements for NCEA physics > David > > We have no requirements moving from L1 physics to L2, but those that only > take L1 Science must pass 16 credits in both science and maths and they > must > include both algebra and a merit in science 1.6 (physics). We usually let > them in if they only get an A but it doesn't hurt to try and push them! > > At present moving from L2 to L3 requires 16 credits in both maths and > physics, but we are thinking about increasing that to 18 credits and/or > perhaps including a merit. We are finding those with only 16 credits at A > level are not well enough prepared for L3. > > John Watson > St Bede's College > > > ----- Original Message ----- > From: > To: > Sent: Monday, June 23, 2008 4:00 AM > Subject: Phys-teach-talk Digest, Vol 6, Issue 6 > > >> Send Phys-teach-talk mailing list submissions to >> phys-teach-talk at nzip.org.nz >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz >> or, via email, send a message with subject or body 'help' to >> phys-teach-talk-request at nzip.org.nz >> >> You can reach the person managing the list at >> phys-teach-talk-owner at nzip.org.nz >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of Phys-teach-talk digest..." >> >> >> Today's Topics: >> >> 1. Physics Entry Requirements (David King) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Sun, 22 Jun 2008 20:58:31 +1200 >> From: David King >> Subject: Physics Entry Requirements >> To: PHYSICS TALK >> Message-ID: <63DFE90C-75A5-4AF8-B468-62B071E29F4E at christscollege.com> >> Content-Type: text/plain; charset="us-ascii" >> >> Just wondering... >> >> What entry requirements do others have for pupils moving either >> >> from Level 1 Science or Physics to Level 2 Physics >> >> and >> >> From Level 2 Physics to Level 3 Physics >> >> At the moment we have no specific requirement for entry into these >> courses in terms of grades or credits obtained, >> >> but I remember from a cluster group meeting someone saying pupils >> required at least one 'M' grade in a standard to progress to the next >> level. >> >> Cheers >> >> >> >> David King >> Physics HoD >> Christ's College >> Private Bag 4900 >> Christchurch >> New Zealand >> >> >> >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080622/d21c7926/attachment-0001.html >> >> ------------------------------ >> >> _______________________________________________ >> Phys-teach-talk mailing list >> Phys-teach-talk at nzip.org.nz >> http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz >> >> >> End of Phys-teach-talk Digest, Vol 6, Issue 6 >> ********************************************* >> > > > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > From Haggis.Henderson at rodneycollege.school.nz Thu Jun 26 20:05:23 2008 From: Haggis.Henderson at rodneycollege.school.nz (Haggis Henderson) Date: Fri, 27 Jun 2008 12:05:23 +1200 Subject: Entry requirements for NCEA2 Physics at Rodney College Message-ID: <8FAF8C8AF87D1B4F9A92AE7E23607A761248F2@rc-dc1.rodney.local> Kia Ora everyone I have been off crook for some time and that is why my contribution to this issue is later than I'd like. However, at the end of this email is an excerpt from the option choice booklet that is circulated among the students at Rodney College when they are making their choices for the following year. When NCEA first came in for Physics I went through the achievement standards for both Maths and Science at level one and looked at the skills I thought the candidates would need. As you can see I have not included things like circle geometry, statistics or Biological Systems but I have included those standards that assessed those skills I thought the candidates would need - like measurement, practical science investigations, algebraic manipulation and the like I'd be interested in any opinions other folk might have as, like many schools, I am a one-man-band when it comes to Physics and the opportunity for input from other folk is rare and precious. Cheers and thanks T ("Haggis") Henderson Physics Teacher Rodney College Wellsford Begins Entry Requirements: NCEA level 1 Science and Mathematics with 15 credits in each. You must have Achievement Standards 1.1 (Practical Investigation) and 1.6 (Physical Systems), with six or more credits coming from other Achievement Standards. In mathematics, you must have Achievement Standards 1.1 (Algebra equations), 1.3 (Measurement), 1.7 (Numeracy) and 1.8 (Right Angled Trigonometry), with three or more credits coming from other Achievement Standards. Ends -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080627/98f50e13/attachment.html From denisburchill at yahoo.com.au Sat Jun 28 06:25:22 2008 From: denisburchill at yahoo.com.au (Denis Burchill) Date: Sat, 28 Jun 2008 03:25:22 -0700 (PDT) Subject: Paradoxical Reflections from a Coke can Message-ID: <30795.35225.qm@web55902.mail.re3.yahoo.com> Dear all, Earlier this week a group of my science student teachers showed me a reflection off a can of coke that they were puzzling over. Have a look at the photo I took of the reflection. It's on the following webpage: http://home.clear.net.nz/pages/d.burchill/CokeCan.html Cheers, Denis. Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/mail -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080628/8810e825/attachment.html From denisburchill at yahoo.com.au Sat Jun 28 07:23:01 2008 From: denisburchill at yahoo.com.au (Denis Burchill) Date: Sat, 28 Jun 2008 04:23:01 -0700 (PDT) Subject: Correct webaddress for coke can reflection Message-ID: <674465.58380.qm@web55912.mail.re3.yahoo.com> Sorry, the correct address is http://home.clear.net.nz/pages/d.burchill/CokeCan.html Cheers, Denis. Get the name you always wanted with the new y7mail email address. www.yahoo7.com.au/mail -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080628/6266e2c6/attachment.html From parkerprice at clear.net.nz Sun Jun 29 01:33:41 2008 From: parkerprice at clear.net.nz (Kerry Parker and Andy Price) Date: Sun, 29 Jun 2008 17:33:41 +1200 Subject: Physicists' Tournament: In-Reply-To: <674465.58380.qm@web55912.mail.re3.yahoo.com> References: <674465.58380.qm@web55912.mail.re3.yahoo.com> Message-ID: Dear All IYPT New Zealand International Young Physicists? Tournament Te p?tuki o ng? hinengaro ahup?ngao It is with great pleasure that I can let you know that the details for the 2009 tournament are now on the web at http://www.iypt.org.nz/ In 2009, for the first time, there will be three regional tournaments: in Auckland, Wellington and Christchurch. The details are all on the website. The seven questions for the NZ tournaments are there - accessible for most Year 12 Physics students, but with hidden depths! I thoroughly recommend the competition for developing communication skills as well as good physics thinkers: it is very stimulating for the students and loads of fun. I am really pleased that the NZIP education committee agrees and are supporting the event. (Thanks guys!) If you don't know anything about the competition don't make the mistake I did and start two days before the deadline! Teams need to spend quite a while preparing their solutions, so you are best starting before external exams kick in. I strongly recommend that you think about encouraging students to think about entering the 2009 competition now, or at least early next term. The kids don't have to be brilliant, but they must be fairly good and they must be resourceful. If you have any further questions please contact Paul Haines, whose details are on the website, or contact me (during the day I am at TCS: Freephone: 0800 65 99 88 Ph: +64 4 473 6841 Fax: +64 4 471 2406 Email: kerry.parker at correspondence.school.nz ) regards Kerry -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080629/86970a1f/attachment.html From francis.Bryden at stcuthberts.school.nz Sun Jun 29 22:43:30 2008 From: francis.Bryden at stcuthberts.school.nz (Bryden, Francis) Date: Mon, 30 Jun 2008 14:43:30 +1200 Subject: No subject Message-ID: When you tap a glass beaker with a spoon you get a high frequency sound. Can anyone explain why the frequency drops when you pour in water Thanks ................ Francis Francis Bryden HoD Physics St Cuthbert's College 122 Market Rd or Box 26 020 Epsom Epsom Auckland 1051 Auckland 1344 New Zealand New Zealand ph: 64 9 5204159 ext 7808 fbryden at stcuthberts.school.nz P Please consider the environment before printing this email -------------------------------------------------------- This message (and any associated files) is intended only for the use of the individual or entity to which it is addressed and may contain information that is confidential, subject to copyright or constitutes a trade secret. If you are not the intended recipient you are hereby notified that any dissemination, copying or distribution of this message, or files associated with this message, is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and deleting it from your computer. Messages sent to and from us may be monitored. -------------------------------------------------------- This email has been checked by Symantec Mail Security for Exchange. 14:43:30 Mon 30 Jun 2008 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080630/a36a9cca/attachment.html From dhousden at xtra.co.nz Mon Jun 30 03:21:26 2008 From: dhousden at xtra.co.nz (David Housden) Date: Mon, 30 Jun 2008 19:21:26 +1200 Subject: sound in glass In-Reply-To: References: Message-ID: <028901c8da81$e90d79f0$bb286dd0$@co.nz> Hi Francis I have just tried a similar expt with a glass mug (school issue!!) - I get the opposite result - used a simple FFT application to see the frequencies etc. Bizarre!! I remember a similar expt presented in Jearl Walker's book "The flying circus of physics" in which he asks why the frequency changes (while tapping on the side of the cup) during the process of adding instant coffee or milk to hot water. I believe this is due to a change in velocity (due to air-filled water having a lower speed of sound than the non airfilled). Maybe this would be a good IYPT problem?? Cheers David From: phys-teach-talk-bounces at nzip.org.nz [mailto:phys-teach-talk-bounces at nzip.org.nz] On Behalf Of Bryden, Francis Sent: Monday, 30 June 2008 2:44 p.m. To: phys-teach-talk at nzip.org.nz Subject: When you tap a glass beaker with a spoon you get a high frequency sound. Can anyone explain why the frequency drops when you pour in water Thanks ................ Francis Francis Bryden HoD Physics St Cuthbert's College 122 Market Rd or Box 26 020 Epsom Epsom Auckland 1051 Auckland 1344 New Zealand New Zealand ph: 64 9 5204159 ext 7808 fbryden at stcuthberts.school.nz P Please consider the environment before printing this email _____ This message (and any associated files) is intended only for the use of the individual or entity to which it is addressed and may contain information that is confidential, subject to copyright or constitutes a trade secret. If you are not the intended recipient you are hereby notified that any dissemination, copying or distribution of this message, or files associated with this message, is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and deleting it from your computer. Messages sent to and from us may be monitored. _____ This email has been checked by Symantec Mail Security for Exchange. 14:43:30 Mon 30 Jun 2008 No virus found in this incoming message. Checked by AVG. Version: 8.0.101 / Virus Database: 270.4.3/1525 - Release Date: 29/06/2008 3:09 p.m. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080630/ce4f2ad2/attachment.html From dking at christscollege.com Mon Jun 30 03:40:19 2008 From: dking at christscollege.com (David King) Date: Mon, 30 Jun 2008 19:40:19 +1200 Subject: tapping cups In-Reply-To: References: Message-ID: <7C1446C8-0615-4C6E-9EF2-3D78ADE5F5C3@christscollege.com> Francis, The naked scientist covered this on a podcast some time back...wish I could remember the answer. And I am completely flummoxed by David H's being the reverse! On a related note(pun intended): Get a metal wire rack from an oven. Hold it in a vertical plane. Tie strings to the top left and top right corners. Wrap the strings around you right and left index fingers respectively, so you are holding the rack up by the strings. Stick your index fingers in your ears. Get a helper to hit the rack with a wooden spoon (or some such). Beautiful. (And I think I can 'explain' why!) Cheers David King Physics HoD Christ's College Private Bag 4900 Christchurch New Zealand On 30/06/2008, at 2:43 PM, Bryden, Francis wrote: > When you tap a glass beaker with a spoon you get a high frequency > sound. > > Can anyone explain why the frequency drops when you pour in water > > > > Thanks ................ Francis > > > > Francis Bryden > > HoD Physics > > St Cuthbert's College > > 122 Market Rd or Box 26 020 > > Epsom Epsom > > Auckland 1051 Auckland 1344 > > New Zealand New Zealand > > > > ph: 64 9 5204159 ext 7808 > > > > fbryden at stcuthberts.school.nz > > > > > P Please consider the environment before printing this email > > > This message (and any associated files) is intended only for the > use of the individual or entity to which it is addressed and may > contain information that is confidential, subject to copyright or > constitutes a trade secret. If you are not the intended recipient > you are hereby notified that any dissemination, copying or > distribution of this message, or files associated with this message, > is strictly prohibited. If you have received this message in error, > please notify us immediately by replying to the message and deleting > it from your computer. Messages sent to and from us may be monitored. > > > > This email has been checked by Symantec Mail Security for Exchange. > 14:43:30 Mon 30 Jun 2008 > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080630/d6089c85/attachment-0001.html From dking at christscollege.com Mon Jun 30 03:49:10 2008 From: dking at christscollege.com (David King) Date: Mon, 30 Jun 2008 19:49:10 +1200 Subject: Correct webaddress for coke can reflection In-Reply-To: References: Message-ID: Denis, OK -I'm probably the only one who hasn't a clue. Could you give me a clue? Cheers David King Physics HoD Christ's College Private Bag 4900 Christchurch New Zealand On 28/06/2008, at 11:23 PM, Denis Burchill wrote: > Sorry, > > the correct address is > http://home.clear.net.nz/pages/d.burchill/CokeCan.html > > Cheers, > Denis. > > > > Get the name you always wanted with the new y7mail email > address._______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080630/3effe3e7/attachment.html From xtr118950 at xtra.co.nz Mon Jun 30 08:16:07 2008 From: xtr118950 at xtra.co.nz (Paul King) Date: Tue, 01 Jul 2008 00:16:07 +1200 Subject: sound in glasses Message-ID: To make the "strings in your ears, tied to wire oven racks" demo a little more practical - use wire coathangers with cotton "strings". Non greasy, easier to get a class set and the noise is just as wondrous ( Distant bells echoing in the hills ) I have a prepared class set, with cotton already tied on. Free to a good home with almost all the earwax cleaned of. Paul King From bbritton at paradise.net.nz Mon Jun 30 09:01:34 2008 From: bbritton at paradise.net.nz (Ben) Date: Mon, 30 Jun 2008 09:01:34 -0400 Subject: Correct webaddress for coke can reflection In-Reply-To: References: Message-ID: <4868D92E.4040803@paradise.net.nz> Hi David Here's my two cents: I guess the negative effect is due to specular vs. diffuse reflection. The metallic red Coke can reflects the light from the window specularly and projects the curved red image on the desk. The white lettering reflects diffusely, so the letters show up as voids in the reflected image. The light is reflected everywhere evenly, so it cannot project an image. I'm out of the country right now but I think that NZ coke cans have a thin outline of bare Aluminium around the white lettering, which reflects specularly and shows up as a bright outline. I hope this helps Ben David King wrote: > Denis, > > OK -I'm probably the only one who hasn't a clue. > > Could you give me a clue? > > Cheers > > David King > Physics HoD > Christ's College > Private Bag 4900 > Christchurch > New Zealand > > > > > On 28/06/2008, at 11:23 PM, Denis Burchill wrote: > >> Sorry, >> >> the correct address is >> http://home.clear.net.nz/pages/d.burchill/CokeCan.html >> >> Cheers, >> Denis. >> >> >> ------------------------------------------------------------------------ >> >> Get the name you always wanted with the new y7mail email address >> ._______________________________________________ >> Phys-teach-talk mailing list >> Phys-teach-talk at nzip.org.nz >> http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > > ------------------------------------------------------------------------ > > _______________________________________________ > Phys-teach-talk mailing list > Phys-teach-talk at nzip.org.nz > http://nzip.org.nz/mailman/listinfo/phys-teach-talk_nzip.org.nz > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080630/45858954/attachment.html From xtr118950 at xtra.co.nz Mon Jun 30 17:52:12 2008 From: xtr118950 at xtra.co.nz (Paul King) Date: Tue, 01 Jul 2008 09:52:12 +1200 Subject: Reflecting coke cans Message-ID: About the Coke can (great picture ) ? there is a chance that the logo paint used is reflective paint ? that is retro-reflective ? the incident light is reflected back along the incident path. Meaning that there will be no light (or hardly any) reflected at angle of incidence = angle of reflection. This is achieved in the paint by having it full of (tiny) transparent spheres ? light incident from any direction basically does several total internal reflections and emerges going back the way it came in. Its the stuff used in road signs (so your headlights shine back at you ) and stick on reflective tape. Why would you use it on Coke cans? If this is the real reason then the ?white? reflection from the black edgeing is in fact just a ?bright? reflection from something that is shiny ( a specular reflection); no matter that it is a dark colour. Just thought. Bright Sunlight on road signs can give off a rainbow reflection. I had assumed that this was some sort of thin film interference effect but now wonder if it might be an actual "rainbow" with the colour separation bought about by change in velocity instead of change of phase. Its a bright morning here on the Coast - I'm goig down the road to have a look at the Stop signs. Paul King From bevans at es.co.nz Mon Jun 30 20:01:02 2008 From: bevans at es.co.nz (Bob Evans) Date: Tue, 01 Jul 2008 12:01:02 +1200 Subject: Reflecting coke cans In-Reply-To: Message-ID: <5.1.1.6.0.20080701115559.02b9bd88@pop.ihug.co.nz> At 09:52 a.m. 1/07/2008 +1200, Paul King wrote: >Just thought. Bright Sunlight on road signs can give off a rainbow >reflection. I had assumed that this was some sort of thin film interference >effect but now wonder if it might be an actual "rainbow" with the colour >separation bought about by change in velocity instead of change of phase. >Its a bright morning here on the Coast - I'm goig down the road to have a >look at the Stop signs. The paint used on road markings contains tiny transparent spheres; glass perhaps, about 0.1 mm in diameter. Presumably the same is used on stop signs, etc. They therefore work like rain drops creating rainbows. To see the rainbow effects from signs the light source has to be directly behind you, as for rainbows. Bob From dking at christscollege.com Mon Jun 30 20:27:51 2008 From: dking at christscollege.com (David King) Date: Tue, 1 Jul 2008 12:27:51 +1200 Subject: Coke Can Message-ID: <8B213497-52C1-4A80-BF6D-C68F6D9BFECD@christscollege.com> So, depending on the angle you look at it, the Coca-Cola writing can look black? Never noticed that! Cheers David King Physics HoD Christ's College Private Bag 4900 Christchurch New Zealand -------------- next part -------------- An HTML attachment was scrubbed... URL: http://nzip.org.nz/pipermail/phys-teach-talk_nzip.org.nz/attachments/20080701/857dc197/attachment.html