A book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
A. on all three.
B. only on the book.
C. only on the chair.
D. upwards on the chair and downwards on the book.
E. only on the objects that you have defined to be part of the system.
Answer: C
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According to the Aristotelian view of motion, which of these would NOT work?
a. an arrow flying away from a bow a rocket ship going to the moon b. an apple falling from a tree to the ground a person climbing a tree c. a stone dropping through water to the creek bed
Why do we see essentially the same face of the Moon at all times?
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Under which circumstances can you be sure that the thermal pressure within a gas cloud is increasing?
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