A ball is thrown across the street. During its flight, the ball's speed is lowest at
A. the beginning of its flight.
B. The speed is constant throughout the flight
C. the highest point of its flight.
D. the end of its flight.
Answer: C
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When spiral galaxies do collide, the impact is greatest on their:
A) individual stars. B) galactic nuclei. C) giant molecular clouds. D) open clusters. E) globular clusters.
A 0.140-kg baseball is dropped from rest from a height of 2.2 m above the ground. It rebounds to a height of 1.6 m. What change in the ball's momentum occurs when the ball hits the ground?
A) 0.117 kg?m/s upwards B) 0.117 kg?m/s downwards C) 1.70 kg?m/s upwards D) 0.350 kg?m/s upwards E) 0.350 kg?m/s downwards
If dark matter were to be found on this planet it would likely be
A) high in our atmosphere. B) within our oceans. C) within Earth's mantle. D) at the center of Earth's core.
A constant magnetic flux through a closed loop of wire induces an emf in that loop
Indicate whether the statement is true or false