When the temperature of a fixed volume of air initially at 0° C is lowered by 1 degree, its pressure
A) decreases by 1/273.
B) decreases by 100/273.
C) increases by 1/273.
D) increases by 100/273.
Answer: A
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As one approaches the bottom of a body of water, the circles shown in figure Q1.3 for water waves moving along the water’s surface become increasingly vertically flattened ellipses. This means that the waves near the body’s bottom are more (A) transverse or (B) longitudinal than those near the surface? 
A. Transverse B. Longitudinal
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a. ultraviolet b. infrared c. x ray d. microwave e. gamma ray
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If an electric charge is shaken up and down frequently enough
A) sound can be emitted. B) light can be emitted. C) both of these D) neither of these