Titan is an interesting moon because:
A) beneath its clouds, Titan may be Earth-like, with liquid water.
B) the Huygens rover has sent back images of sedimentary rocks there.
C) it has a rich atmosphere that may resemble that of the early Earth.
D) it is known to have ice volcanism on its surface.
E) All of the above.
C
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A car travels 20 km west and then 20 km south. What is the magnitude of its displacement vector?
A) 20 km B) 0 km C) 40 km D) 28 km
The only spacecraft to go into orbit around Jupiter was:
A) Voyager 2. B) Pioneer 10. C) Cassini. D) Galileo. E) Viking I.
Two insulated current-carrying straight wires of equal length are arranged in the lab so that Wire A carries a current northward and Wire B carries a current eastward, the wires crossing at their midpoints separated only by their insulation. Which of the statements below is true?
a. There are no forces in this situation. b. The net force on Wire B is southward. c. There are forces, but the net force on each wire is zero. d. The net force on Wire A is westward.
The runaway greenhouse effect on Venus is most directly responsible for which planetary characteristic?
A. Venus's polar vortex B. the planet's retrograde rotation C. the absence of water on Venus D. the absence of a planetary magnetic field at Venus