For a fixed amount of gas, if the absolute temperature of the gas is doubled, what happens to the pressure of the gas?
A)
The answer cannot be determined without volume information.
B)
The pressure of the gas becomes double the original pressure.
C)
The pressure of the gas becomes triple the original pressure.
D)
The pressure of the gas becomes one half the original pressure.
E)
The pressure of the gas becomes four times the original pressure.
A
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Lonnie pitches a baseball of mass 0.15 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s, what is the impulse experienced by the ball?
a. 360 N•s c. 400 N•s b. 20 N•s d. 15 N•s
A mountain that floats on the mantle indicates that the density of the mantle is
A) less than that of the mountain. B) about the same as that of the mountain. C) greater than that of the mountain. D) none of the above
The cooling effect inside a refrigerator is produced by
A) an electric motor that converts electrical energy to internal energy. B) compressing the refrigeration gas. C) vaporizing the refrigeration liquid. D) proper insulation. E) exchanging warmer air with colder air.
Strictly speaking, if a beam of white light is shone through a piece of very thick glass, the first color to emerge from the other side is
1) white. 2) violet. 3) red. 4) green. This is because 5) all frequencies travel at c. 6) lower frequencies undergo more refraction in a medium. 7) higher frequencies of light travel at a faster average speed through a medium. 8) higher frequencies of light interact with more molecules in a medium.