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An old friendlittle changed Albert C. Claus Citation: The Physics Teacher 21, 558 (1983); doi: 10.1119/1.2341410 View online: http://dx.doi.org/10.1119/1.2341410 View Table of Contents: http://scitation.aip.org/content/aapt/journal/tpt/21/8?ver=pdfcov Published by the American Association of Physics Teachers Articles you may be interested in Old friendrevisited Phys. Teach. 25, 121 (1987); 10.1119/1.2342181 Women astronomers' status little changed Phys. Today 33, 80 (1980); 10.1063/1.2914196 An old and good friend Phys. Teach. 15, 442 (1977); 10.1119/1.2339726 Little Old Ladies Don't Understand Phys. Today 21, 192 (1968); 10.1063/1.3034730 Climate change is friend and foe to ozone layer Phys. Today This article is copyrighted as indicated in the article. Reuse of AAPT content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP: 128.138.73.68 On: Tue, 23 Dec 2014 01:32:12

An old friend-little changed

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An old friendlittle changedAlbert C. Claus Citation: The Physics Teacher 21, 558 (1983); doi: 10.1119/1.2341410 View online: http://dx.doi.org/10.1119/1.2341410 View Table of Contents: http://scitation.aip.org/content/aapt/journal/tpt/21/8?ver=pdfcov Published by the American Association of Physics Teachers Articles you may be interested in Old friendrevisited Phys. Teach. 25, 121 (1987); 10.1119/1.2342181 Women astronomers' status little changed Phys. Today 33, 80 (1980); 10.1063/1.2914196 An old and good friend Phys. Teach. 15, 442 (1977); 10.1119/1.2339726 Little Old Ladies Don't Understand Phys. Today 21, 192 (1968); 10.1063/1.3034730 Climate change is friend and foe to ozone layer Phys. Today

This article is copyrighted as indicated in the article. Reuse of AAPT content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:

128.138.73.68 On: Tue, 23 Dec 2014 01:32:12

Page 2: An old friend-little changed

This article is copyrighted as indicated in the article. Reuse of AAPT content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:

128.138.73.68 On: Tue, 23 Dec 2014 01:32:12

Page 3: An old friend-little changed

This article is copyrighted as indicated in the article. Reuse of AAPT content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:

128.138.73.68 On: Tue, 23 Dec 2014 01:32:12