The surface structure of Saturn's largest satellite, Titan, is completely unknown because no spacecraft so far could take pictures through Titan's thick clouds.
A. False, but all information related to Titan's surface comes from radar images taken by the Cassini spacecraft.
B. False, recently in 2005, Cassini parachuted a probe into Titan's atmosphere and took the pictures of its surface.
C. True, because no probe can pass through Titan's methane and ethane clouds.
D. True, because Titan's atmosphere blocks all wavelengths of electromagnetic radiation.
Answer: B
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A current may be induced in a coil by
a. moving one end of a bar magnet through the coil. b. moving the coil toward one end of the bar magnet. c. holding the coil near a second coil while the electric current in the second coil is increasing. d. all of the above. e. none of the above.
An RLC series circuit has a 200 
resistance, a 3.00 mH inductor, and a 100 ?F capacitor. What is the resonant frequency for this circuit?
A. 1.80 kHz B. 1.80 MHz C. 290 Hz D. 290 kHz E. 11.0 kHz
A steel wire in a piano has a length of 0.700 m and a mass of 4.30 grams. To what tension must this wire be stretched to make the fundamental frequency correspond to middle C, (fc = 261.6 Hz)?
The best places for life to have formed on Earth are believed to have been
a. near the south pole in places where water is frozen solid as ice. b. on the continent of Africa in the areas with no water. c. in liquid water, probably in the oceans or pools of water.