A ground observer measures the period of a pendulum moving as a part of an inertial frame of reference to be 2.30 s as the inertial frame moves by at a velocity of 0.800c. What would the observed period be of the same pendulum if its inertial frame were at rest with respect to the observer?
a. 3.03 s
c. 1.84 s
b. 1.38 s
d. 4.25 s
B
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Force on a Wire: When the switch is closed in the circuit shown in the figure, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is
A. a north magnetic pole. B. a south magnetic pole. C. There is not enough information given to answer the question.
The nuclear epoch occurred during the formation of:
A) only protons and neutrons. B) dark energy. C) deuterium and helium. D) all elements up to iron. E) all known elements.
If an atomic nucleus containing 64 nucleons has a radius R, what will be the expected radius of a nucleus containing 512 nucleons?
A) 8R B) 16R C) 4R D) R E) 2R
Mass on a Spring: An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its elastic potential energy is a maximum?
A. at either A or B B. midway between A and B C. one-third of the way between A and B D. one-fourth of the way between A and B E. at none of these points