Why are Saturn's rings much brighter than any other jovian's ring system?
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They are made of bright, shiny, fairly new water ice with a high reflectivity, and a lot of it.
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How are most carbonate rocks formed?
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If a planet has 3 times the radius of the Earth, but has the same density as the Earth, what is the gravitational acceleration at the surface of the planet? (g = 9.80 m/s2)
a. 29.4 m/s2 b. 88.2 m/s2 c. 265 m/s2 d. 3.27 m/s2
A magnifying glass has a convex lens of focal length 15 cm. At what distance from a postage stamp should you hold this lens to get a magnification of +2.0?
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A race car traveling at a constant speed of 50 m/s drives around a circular track that is 500 m in diameter. What is the magnitude of the acceleration of the car?
A) 0 m/s2 B) 1.0 m/s2 C) 10 m/s2 D) 0.63 m/s2 E) 2.2 m/s2