According to the principle of equivalence, gravity is equivalent to
A) velocity.
B) energy.
C) net force.
D) acceleration.
E) the state of free- fall.
Correct Answer:
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Q20: How do we know the shape of
Q21: Evidence for the big bang comes from
A)
Q22: If you were in a rocket ship
Q23: The big bang created
A) space and time.
B)
Q24: The big bang is thought to have
Q26: Galaxies seem to be made mostly of
Q27: The evidence favors a universe whose overall
Q28: Since accelerations are equivalent to gravity, a
Q29: Dark energy
A) has never been directly observed
Q30: According to the theory of cosmic inflation,
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