Titan is the only moon with a thick atmosphere, and its surface ________ .
a. has never been seen.
b. has been seen by infrared light and spacecraft.
c. is warmed by a greenhouse effect.
d. has oceans of liquid methane and ethane.
e. all except a.
Answer: e. all except a.
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A ___________________ binary is shown in the above simulated spectra
a. single-lined spectroscopic
b. double-lined spectroscopic
c. visual
d. eclipsing
Polarization: Unpolarized light of intensity I0 passed through an ideal polarizing sheet with its polarizing axis at the 12 o'clock position and then through a second ideal sheet with its polarizing axis at the 1 o'clock position. What is the intensity of the emerging light in terms of I0?
Fill in the blank(s) with the appropriate word(s).
Rapid evaporation of hot water can lead to
A) superheated steam. B) the formation of ice. C) both of these D) neither of these
There is a magnetic force on a particle. It is possible that the particle is:
a. moving in the direction of the magnetic field. b. stationary. c. not part of a wire. d. uncharged.