Where have scientists begun an active search for life beyond the Earth?
A) Mars B) Venus C) the Moon D) Titan E) Europa
A
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A box sits at rest on an inclined plank. How do the magnitudes of the normal force and the gravitational force exerted on the box compare? (Hints: What is the box’s acceleration? Draw a free-body diagram!)
A. 
B. 
C. 
D. 
E. We do not have enough information to answer.
The strong tendency of certain minerals to break along smooth, parallel planes is known as ________.
Fill in the blank(s) with the appropriate word(s).
A baseball leaves the bat with a speed of 47 m/s and an angle of 45° above the horizontal. A 5.0-m-high fence is located at a horizontal distance of 137 m from the point where the ball is struck. Assuming the ball leaves the bat 1.0 m above ground level, by how much does the ball clear the fence?
a. 59.7 m b. 47.7 m c. 49.7 m d. 121 m
According to the _____, the Moon broke from a rapidly spinning proto-Earth
A) condensation hypothesis B) fission hypothesis C) capture hypothesis D) large-impact hypothesis