A photon is an example of
A)
a lepton.
B)
a meson.
C)
a baryon.
D)
a gauge boson.
E)
hadrons.
D
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The size and shape of a planet's orbit can be determined by
A) the Doppler technique. B) transit observations. C) spectral measurements. D) knowing the planet's mass by any technique and applying Newton's version of Kepler's third law. E) gravitational microlensing.
How do astronomers think Jupiter generates internal heat?
a. fusion b. chemical reactions c. friction due to its fast rotation d. shrinking and releasing gravitational potential energy e. tidal heating
Why would the tidal forces around a black hole be of concern to a space explorer interested in investigating the area near a black hole?
What will be an ideal response?
A rocket explodes into two fragments, one 25 times heavier than the other. The magnitude of the momentum change of the lighter fragment is
A) 25 times as great as the momentum change of the heavier fragment. B) The same as the momentum change of the heavier fragment. C) 1/25 as great as the momentum change of the heavier fragment. D) 5 times as great as the momentum change of the heavier fragment. E) 1/4 as great as the momentum change of the heavier fragment.