If you swing a bucket of water fast enough in a vertical circle, at the highest point the water does not spill out. This happens because an outward force balances the pull of gravity on the water
A) True B) False
B
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Alone among all the large moons, Triton orbits Neptune retrograde, and also at a 20 degree inclination to Neptune's equator
Indicate whether the statement is true or false
Increased air pressure on the surface of hot water tends to
A) prevent boiling. B) promote boiling. C) neither of these
One star appears blue-white while another appears yellow-orange. If this is caused by temperature difference, then
A) the stars are the same brightness. B) the yellow-orange star is hotter. C) the blue-white star is brighter. D) the blue-white star is hotter. E) the yellow-orange star is brighter.
A girl is sitting on the edge of a pier with her legs dangling over the water. Her soles are 80.0 cm above the surface of the water. A boy in the water looks up at her feet and wants to touch them with a reed. (nwater = 1.333.) He will see her soles as being
a. right at the water surface. b. 53.3 cm above the water surface. c. exactly 80.0 cm above the water surface. d. 107 cm above the water surface. e. an infinite distance above the water surface.