Where do the names for the moons of Mars (Phobos and Deimos) come from?
A) the founders of Rome
B) the twins depicted in the constellation Gemini
C) the names of their discoverers
D) the sons of Ares and Aphrodite
E) the names of the dogs of Orion
D
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__________is one of the gaps in the rings of Saturn that are caused by resonances with moons
A) Enceladus B) The Cassini Division C) Galileo's paradox D) The Great Red Spot
By what amount does the sound intensity decrease when the distance to the source triples?
a. 9.0 dB c. 6.0 dB b. 9.5 dB d. 3.5 dB
What is the focal length of the corrective contact lens needed by a nearsighted person whose far point is at 60 cm?
A) -60 cm B) +30 cm C) -30 cm D) +60 cm E) +130 cm
A 1.5m long dowel (a cylindrical rod) is pivoted about the end so that it is a pendulum of sorts - it can freely swing in a vertical plane. The dowel has a diameter of 2.0cm, and its density is 3.2 
When it is positioned in its swing such that its angle with the vertical is 22.5 degrees, what is the torque on the rod about the pivot due to its weight?
A. 17Nm B. 42Nm C. 11Nm D. 10Nm E. 44Nm F. 41 Nm