Case 1: An electron is released from rest in a uniform electric field. Case 2: A proton is released from rest in a uniform electric field of the same magnitude as in case 1 . How does the electric potential energy of the charge-field system behave in these cases?
a. In case 1 the potential energy increases, but in case 2 it decreases.
b. In both cases, the potential energy increases.
c. In case 1 the potential energy decreases, but in case 2 it increases.
d. In both cases, the potential energy decreases.
D
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A) displacement. B) instantaneous velocity. C) average velocity. D) instantaneous acceleration. E) average acceleration.
Standing waves are produced by the superposition of two waves with
A. the same amplitude, frequency, and direction of propagation. B. the same amplitude, frequency, and opposite direction of propagation. C. the same amplitude, different frequencies, and opposite direction of propagation. D. the same amplitude, different frequencies, and same direction of propagation.
The deflection of air and ocean currents from their original direction of motion due to the rotation of Earth is called ________.
A. differentiation B. precession C. revolution D. the Coriolis effect E. circulation
Two point charges are 12 cm apart. They are moved to a new separation of 3 cm. By what factor does the resulting mutual force between them change?
a. 1/4 b. 4 c. 1/16 d. 16 e. 4.5