The temperature of a gas is most closely related to:
A. the kinetic energy of translation of its molecules
B. its total molecular kinetic energy
C. the sizes of its molecules
D. the potential energy of its molecules
E. the total energy of its molecules
Answer: A. the kinetic energy of translation of its molecules
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A. 
B. 
C. 
D. 
E. 
Wave Characteristics: Which one of the following is not an electromagnetic wave?
A. ultraviolet B. infrared C. radio waves D. sound waves E. gamma rays
A satellite near Earth makes a full circle in about 90 minutes. Much farther from Earth, say at the distance to the Moon, time for a full circle would be
A) 90 minutes. B) less than 90 minutes. C) about 28 days. D) not enough information E) none of the above
We are not yet capable of detecting life on planets around other stars. But as our technology develops, our first real chance of detecting such life will probably come from
A) examining spectral lines from the atmospheres of distant planets. B) sending spacecraft to study the planets up close. C) examining high-resolution images of the planets made by orbiting telescopes. D) determining the orbital properties of the planets.