You throw a golf ball at a massive bowling ball at rest and the golf ball bounces backward from it. After the bounce, compared with the golf ball, the bowling ball has more

A) momentum, but less kinetic energy.
B) kinetic energy, but less momentum.
C) momentum and more kinetic energy.
D) less momentum and less kinetic energy.
E) not enough information


Answer: A

Physics & Space Science

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Under what conditions do real gasses approximate the behavior of an ideal gas?

A. high temperature and low pressure B. low temperature and low pressure C. low temperature and high pressure D. high temperature and high pressure

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Melanie says that when a diver enters an underwater cave of height h, the pressure on her is no greater than rWgh. Rosalind says that if the bottom of the cave is a distance H below the water surface, the pressure on the soles of the diver's feet can reach rWgH. Which one, if either, is correct? (The density of water is rW.)

a. Melanie, because the roof of the cave absorbs the water pressure from above. b. Melanie, because only the fluid directly above any volume of the fluid can contribute to the pressure on that volume. c. Rosalind, because a fluid exerts equal pressure in all directions at a given depth. d. Rosalind, because the pressure also depends on the density, rc, of the material above the cave roof, so that p = rcg(H - h) + rWgh. e. Melanie, because the pressure equals p = rWgH - rcg(H - h).

Physics & Space Science

The Hawaiian Islands were formed when

A) oceanic crust sank below continental crust at a tectonic plate boundary B) volcanic material flowed out from the interior at a hot spot beneath the Pacific Ocean C) molten lava oozed out between two tectonic plates that were slowly moving apart D) dense material sank while lighter material rose to the surface during the early geological history

Physics & Space Science

Based on all we know about the terrestrial worlds, what single factor appears to play the most important role in a terrestrial planet's geological destiny?

A) its size B) its composition C) its distance from the Sun D) whether or not it has liquid water

Physics & Space Science