If you double the energy content of a kilogram of gas, the temperature of the gas
A. is unchanged
B. increases by the square-root of 2
C. doubles
D. is multiplied by 4
Answer: C. doubles
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Which of the following statements is true of white dwarfs?
A) Some of them are among the hottest stars known. B) Few of them are positioned in the upper-right corner of the Hertzsprung-Russell (H-R) diagram. C) They have high luminosities. D) They have a very big surface area from which they radiate energy.
Constant Acceleration Kinematics: Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from 56 mi/h to rest than from 28 mi/h?
A. 4 times farther B. 3.2 times farther C. 4.8 times farther D. 5.2 times farther
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What will be an ideal response?
If a star appears to move relative to other stars over a one-year period, this motion is due to the star's
A) transverse motion. B) radial motion. C) parallax shift. D) Doppler shift. E) true space motion.