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.

Physics & Space Science

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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

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Rapid evaporation of hot water can lead to

A) superheated steam. B) the formation of ice. C) both of these D) neither of these

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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.

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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).

Physics & Space Science