When a photon collides with a free electron at rest and the direction of motion of the photon changes,
a. the magnitude of the momentum of the photon does not change. b. the momentum of the electron does not change. c. the kinetic energy of the electron does not change. d. the total energy of the photon does not change. e. both the magnitude of the momentum and the total energy of the photon decrease.
E
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According to the authors of the text, which of the following best describes how our common sense relates to the theory of relativity?
A) Relativity does not violate our common sense because we do not have common sense about motion near the speed of light. B) Relativity violates common sense because it contradicts logic. C) Relativity violates common sense because it is counterintuitive. D) Relativity violates common sense because the theory contradicts itself in many cases. E) Relativity violates common sense because it is full of paradoxes.
If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N ? m2/C2, mel = 9.11 × 10-31 kg)
A) 5.9 × 107 m/s B) 4.9 × 107 m/s C) 3.9 × 107 m/s D) 2.9 × 107 m/s
In a nova, there is a white dwarf, an evolving companion star, and a(n) ________ surrounding the white dwarf's equator
Fill in the blank(s) with correct word
A movie projector is equipped with a 0.5-meter focal length lens that is positioned 0.506 meters from the film. (a) How far from the lens must the screen be if the image on it is to be in focus? (b) How many times larger is the image than the object? (c) Is the image produced a real or a virtual image?