If a body were in orbit very near the surface of the earth, its centripetal acceleration would be equal to g
Indicate whether the statement is true or false
T
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Free Fall: A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?
A. h/4 B. h/2 C. h D. 2h E. 4h
A balloon is filled with cold air and placed in a warm room. It is NOT in thermal equilibrium with the air of the room until:
A. it rises to the ceiling B. it sinks to the floor C. it stops expanding D. it starts to contract E. none of the above
What will you see with the following type of optic: Concave lens
A. Image is smaller |
B. Image is the same |
C. Image is larger |
Velocity: A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average speed?
A. 2.5 m/s B. 5.0 m/s C. 10 m/s D. 0 m/s E. 1.3 m/s