When the first law of thermodynamics, Q = ?U + W, is applied to an ideal gas that is taken through an isobaric process,
A)
?U = 0.
B)
W = 0.
C)
Q = 0.
D)
all of the above
E)
none of the above
E
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A ball is thrown vertically into the air. Because of air resistance, its time coming down compared with its time going up is
A) less. B) the same. C) more.
A book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
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If we compress 4.5 billion years into a calendar year, humans make their mark on the calendar
A) the very last minute of New Years Eve. B) on December 25th. C) at 12:00 pm, December 30th. D) at 11:50 pm, December 31st.
A converging lens will be prescribed by the eye doctor to correct which of the following?
a. glaucoma c. farsightedness b. nearsightedness d. astigmatism