An astronaut on another planet drops a 1-kg rock from rest and finds that it falls a vertical distance of 2.5 meters in one second. On this planet, the rock has a weight of
A) 1 N.
B) 2 N.
C) 3 N.
D) 4 N.
E) 5 N.
Answer: E
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What will be an ideal response?
A force of 1 N accelerates 1-kg box at the rate of 1 m/s2. The acceleration of a 2-kg box by a net force of 2 N is
A) half as much. B) twice as much. C) the same. D) none of the above
If an object feels cold to the touch, the only statement that you can make that must be correct is that
a. the object has a smaller coefficient of thermal conductivity than your hand. b. the volume of the object will increase while it is in contact with your hand. c. the object contains less thermal energy than your hand. d. the object is at a lower temperature than your hand. e. the object cannot be a liquid.
A monatomic ideal gas is compressed isobarically to one-third of its initial volume. The resulting pressure will be
A) three times as large as the initial value. B) equal to the initial value. C) more than three times as large as the initial value. D) equal to the initial value. E) impossible to predict on the basis of this data.