Who discovered the electron in 1897?
a. Dalton
b. Bohr
c. Rutherford
d. Thomson
d
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Two slides have the same height at the top, but one is short and steep while the other is a long gentle slope. If they can be considered frictionless, which will produce the largest speed at the bottom?
A. They produce the same speed at the bottom B. Depends on the mass of the person on the slide C. The steep slide D. The gradual slide
If the position of an electron is measured very precisely there is an uncertainty in measuring its
A) kinetic energy. B) momentum. C) potential energy. D) thermal energy. E) None of the other answers is correct.
In the Compton effect, if a photon is scattered at a particular angle, the resulting shift in wavelength for the scattered photon
A) is the same for all incident energy photons. B) is greater for a higher energy incident photon. C) depends on the wavelength of the incident photon. D) is never the same for incident energy photons. E) is less for a higher energy incident photon.
The sketch shows groups of stars on the H-R diagram, labeled (a) through (e); note that (a) represents the entire main sequence, while (c) and (d) represent only small parts of the main sequence. Which group represents the most common type of stars?
A) b B) c C) d D) e