ISSN:0002-9505    

DOI:10.1119/1.13686

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.13687

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.13688

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.13690

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.4755905

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

A newly discovered letter written by Albert Einstein to a close friend, Heinrich Zangger, reveals Einstein’s reaction to David Hilbert’s work on the gravitational field equations in the theory of general relativity. Hilbert’s work was done at the same time as Einstein’s, and for a short while, Einstein felt that Hilbert had come close to plagiarizing.

ISSN:0002-9505    

DOI:10.1119/1.13691

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

The role of induced emf’s in circuits is explored using batteries and bulbs. This technique both uncovers students’ misconceptions about emf’s and provides a route towards better understanding of the nature of induced emf’s. The examples illustrate, at a more elementary level, the effects discussed in recent articles by Reif and Romer.

ISSN:0002-9505    

DOI:10.1119/1.13692

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

General theoretical considerations and assumptions determine in order of magnitude the length of the day and year on habitable planets. These time scales are expressible in terms of fundamental constants, and their universality may have implications for extraterrestrial life.

ISSN:0002-9505    

DOI:10.1119/1.13693

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

A semi‐quantitative undergraduate experiment is described which verifies that the attenuation of microwaves propagating in a lossy liquid medium depends both on the distance traveled by the wave in the medium, as well as on the medium’s electric conductivity.

ISSN:0002-9505    

DOI:10.1119/1.13694

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP

摘要:

Streak photography has been used primarily for fluid flow visualizations. A method which extends the application of streak photography to velocity measurements is presented. The technique may be applied to a broad range of fluid dynamical experiments and requires only limited technical resources.

ISSN:0002-9505    

DOI:10.1119/1.13695

出版商:American Association of Physics Teachers    

年代:1984

数据来源: AIP