Which of the following Mars surface features provides dramatic evidence that volcanism has played a role in shaping the surface of Mars?
A. the polar caps
B. the southern highlands
C. Valles Marineris
D. Olympus Mons
Ans: D. Olympus Mons
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For simplicity, a professor uses 9.8 (meters per second) per second for the acceleration due to gravity instead of the more precise 9.81 (meters per second) per second. If Cavendish had made the same approximation, his estimate for Earth's mass have been
A. too high B. too low
The lobes of a radio galaxy can be as much as:
A) dozens of light years from the galaxy's nucleus. B) hundreds of light years from the galaxy's nucleus. C) thousands of light years from the galaxy's nucleus. D) millions of light years from the galaxy's nucleus. E) billions of light years from the galaxy's nucleus.
If we compress the entire history of the into one year, each second represents
A) about a billion years B) a few tens of millions of years C) a few hundred years D) a few million years
A Cessna aircraft has a lift-off speed of 135 km/h. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 260 m?
a. 2.70 m/s2 b. 1.35 m/s2 c. 3.38 m/s2 d. 5.41 m/s2 e. 2.03 m/s2