摘要:

Under certain conditions, the presence of a sheath separating electrodes from the body of a plasma can give rise to a reversal of the electric field direction in the discharge. In addition, there may be a considerable gain in the strength of the field. This paper deals with a simplified model of the effect that can be employed as a rather interesting problem in an undergraduate electricity and magnetism course.

ISSN:0002-9505    

DOI:10.1119/1.10354

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

摘要:

An experiment is described that allows students to compare the predictions of several models for the drag force with observations made in the laboratory. The students can determine the ranges of validity of the Stokes’s law and Newton’s law expressions for the drag force as well as discover the good agreement with experiment obtained by the numerical solution of the exact equation of motion. The computer program devised for this purpose can be used to simulate the motion of falling objects in situations not directly covered in the laboratory.

ISSN:0002-9505    

DOI:10.1119/1.10286

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

摘要:

Two ultrasonic transducers, the receiver stationary at the end on a linear air track, and the source mounted on a moving glider, are the basis for a Doppler shift experiment. The source frequency and the shifted receiver frequency are fed into a digital phase detector circuit which produces an output difference frequency with a sinusoidal waveform. This Doppler shift frequency can be measured directly and compared with the shift predicted from theory.

ISSN:0002-9505    

DOI:10.1119/1.10287

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10288

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10289

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

摘要:

The scattering of slow neutrons as a function of the target structure factor in the impulse approximation is used as an example of the distortions of a Gaussian or Poisson distribution. (AIP)

ISSN:0002-9505    

DOI:10.1119/1.10290

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

摘要:

An exact solution is obtained for the Hartree–Fock equation as applied to the one‐dimensional helium atom. (AIP)

ISSN:0002-9505    

DOI:10.1119/1.10291

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10292

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10293

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10295

出版商:American Association of Physics Teachers    

年代:1976

数据来源: AIP