While an iron block near the Earth's surface is in free fall, it undergoes an increase in
A) speed.
B) acceleration.
C) both of these
D) neither of these
Answer: A
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According to Olbers's paradox, the night sky should:
A) be pitch black. B) be black with tiny stars. C) be glowing blindingly bright. D) have alternate phases of brightness and darkness.
Bulk Modulus: Two solid spheres are made from the same material, but one has twice the diameter of the other. Which sphere will have the greater bulk modulus?
A. the larger one B. the smaller one C. It will be the same for both spheres.
A car travels at a steady 40.0 m/s around a horizontal curve of radius 200 m. What is the minimum coefficient of static friction between the road and the car's tires that will allow the car to travel at this speed without sliding?
A) 1.23 B) 0.952 C) 0.816 D) 0.662 E) 0.736
A hunter wishes to cross a river that is 1.5 km wide and flows with a velocity of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 12 km/h with respect to the water. What is the minimum time for crossing?