摘要:

We present and discuss a physics demonstration, similar to, but distinct from, the ballistic-pendulum demonstration, one that illustrates all three conservation laws of mechanics (for energy, momentum, and angular momentum) simultaneously.

ISSN:0031-921X    

DOI:10.1119/1.879974

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Expressions for the potential energies between two protons are given for the gravitational, electromagnetic, strong, and weak forces.

ISSN:0031-921X    

DOI:10.1119/1.879952

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

An apparatus for producing a rotating liquid parabolic mirror and a laser inclinometer for measuring the slope of the mirror at a given radial distance from the optical axis are described. Several first-year optics experiments that can be performed with the apparatus are described.

ISSN:0031-921X    

DOI:10.1119/1.879953

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

This paper describes how to connect the concepts of kinematics and dynamics with everyday life experience by using rollerblades in teaching mechanics. We describe seven experiments that were performed by the author while teaching general physics and science courses at Rutgers University.

ISSN:0031-921X    

DOI:10.1119/1.879954

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

I use to dread the introductory lecture on measurement that I gave to all my general-education physics classes (nonscience majors). Now this lecture is one of the highlights of the course. My solution is to ask the class to estimate the length of time it would take for the occupants of the classroom to use up “all the available air.”

ISSN:0031-921X    

DOI:10.1119/1.879955

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Parallel wires, carrying currents in the same direction, attract each other. The student who understands this message on the theoretical level knows the Biot-Savart law and a couple of manifestations of the right-hand rule. On the other hand, Roget’s spiral provides direct evidence of the direction of the interaction between the two wires.

ISSN:0031-921X    

DOI:10.1119/1.879956

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

This paper describes an experiment to study Kepler’s three laws of planetary motion that is appropriate for lower-division physics and astronomy courses.

ISSN:0031-921X    

DOI:10.1119/1.879959

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

This note demonstrates how to use software

ISSN:0031-921X    

DOI:10.1119/1.879975

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

The force exerted by a vertically falling chain being brought to rest on a horizontal surface can be measured as a function of time using “off-the-shelf” hardware and software. The results confirm the prediction based on impulse and momentum considerations.

ISSN:0031-921X    

DOI:10.1119/1.879960

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Without a spectrometer, the refractive index of a liquid can be measured as a function of temperature by means of a laser beam, meterstick, and triangular tank. The estimated error is ±0.001.

ISSN:0031-921X    

DOI:10.1119/1.879961

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP