A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves at constant velocity. When the glue gives way, the stone falls and hits the floor
A) ahead of the midpoint of the ceiling.
B) exactly below the midpoint of the ceiling.
C) behind the midpoint of the ceiling.
D) none of the above
Answer: B
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The only evidence that astronomers have supporting the hypothesis that quasars are very distant objects is the fact that spectral lines of quasars have huge redshifts.
Answer the following statement true (T) or false (F)
The Greek astronomer who assigned the stars to six magnitudes was named ______________
Fill in the blank(s) with correct word
Answer the following statement(s) true (T) or false (F)
1. Transform boundaries result in new crust being formed at the surface. 2. The Andes Mountains are a result of continental-continental collision.
Water causes partial melting of the mantle at which type of plate boundary?
A) convergent boundaries B) divergent boundaries C) transform-fault boundaries