The most prominent feature of Mars observable from Earth is:
A) its thick atmosphere.
B) its two prominent moons.
C) its bright polar caps.
D) the large volcano Olympus Mons.
E) the prominent feature, Valles Marineris.
C
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Simple harmonic oscillations can be modeled by the projection of circular motion at constant angular velocity onto a diameter of the circle. When this is done, the analog along the diameter of the acceleration of the particle executing simple harmonic motion is
A. the displacement from the center of the diameter of the projection of the position of the particle on the circle. B. the projection along the diameter of the velocity of the particle on the circle. C. the projection along the diameter of tangential acceleration of the particle on the circle. D. the projection along the diameter of centripetal acceleration of the particle on the circle. E. meaningful only when the particle moving in the circle also has a non-zero tangential acceleration.
Energy Conservation With Conservative Forces: When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed should you throw it up vertically so it will go twice as high?
A. 16V
B. 8V
C. 4V
D. 2V
E. 
V
Transformers: An ideal step-down transformer is needed to reduce a primary voltage of 120 V to 6.0 V. What must be the ratio of the number of turns in the secondary to the number of turns in the primary?
Fill in the blank(s) with the appropriate word(s).
According to the planetary migration model, the jovian planets are thought to have formed
A) in the orbit where they are now. B) further from the Sun than they are now. C) in another solar system. D) closer to the Sun than they are now. E) none of the above.