An object is released from rest a height h above the ground. A second object with four times the mass of the first is released from the same height. The potential energy of the second object compared to the first is
A) one-fourth as much.
B) one-half as much.
C) twice as much.
D) four times as much.
E) eight times as much.
D
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So far, beyond the solar system, the extrasolar planets found have been mostly
A) terrestrials with very elongated, distant orbits like comets. B) terrestrials very close to their star, and transiting its disk. C) large jovians very close to their star. D) large jovians orbiting solar-type stars about where our jovians are found. E) brown dwarfs much more massive than Jupiter.
The time constant in an RC circuit is the time that is required for the current in a circuit with an initially uncharged capacitor to reach what percentage of its final value?
A. 63% B. 90% C. 37% D. 100% E. 50%
Which of the following is true of the cosmic microwave background?
A) It is radiation that existed before the big bang. B) It appears to come from a blackbody. C) It is radiation present in the ultraviolet spectrum. D) It has a very small redshift of about 10.
How does the Solar Nebula theory explain the formation and orbital properties of planets?
What will be an ideal response?