The Cassini division seen in Saturn's rings is the result of a gravitational interaction from one of its moons on Saturn's rings.
Answer the following statement true (T) or false (F)
True
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The equivalence principle says that a person in an elevator that is in freefall feels the same acceleration as
A) a person in an elevator going up with an acceleration of g. B) a person in space, far from any gravitational source accelerating at g. C) a person in an elevator going down with an acceleration of g. D) a person in space, far away from any gravitational source with no acceleration. E) a person in orbit of Earth accelerating at g upward.
A person applies a constant force of 20 N to a rock of mass 1000 kg, for a total of 20 seconds. What is the work done by this person if the rock does not move at all by this applied force?
A) 1000 J B) 2000 J C) 20,000 J D) 0 J E) 400 J
A ball collides with a second ball at rest. After the collision, the first ball comes to rest and the second ball moves off at the speed of the first ball. In this collision
A. total momentum is not conserved. B. total kinetic energy is not conserved. C. total momentum is conserved but total kinetic energy is not conserved. D. total momentum is not conserved but total kinetic energy is conserved. E. total momentum and total kinetic energy are conserved and the masses are equal.
The most abundant materials in the solar nebula were
A) hydrogen compounds like water, methane, and ammonia B) hydrogen and helium gases C) metals D) rocks