How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0 s?
A. 0.22 kJ
B. 0.20 kJ
C. 0.24 kJ
D. 0.27 kJ
E. 0.31 kJ
Answer: B
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A) bending. B) expansion. C) contraction. D) heat.
Which of the following products of ratios gives the conversion factors to convert meters per second 
to miles per hour 
?
A.
B.
C.
D.
E.
A 400-g piece of metal at 120.0°C is dropped into a cup containing 450 g of water at 15.0°C. The final temperature of the system is measured to be 40.0°C
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