Both nuclear reactors and atomic bombs use nuclear chain reactions
a. True
b. False
Indicate whether the statement is true or false
True
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Spring tides occur during the new and full lunar phases
a. True b. False Indicate whether the statement is true or false
When sound travels faster near the ground than above, bending of sound tends to be
A) upward. B) downward. C) to the left. D) to the right. E) none of the above
An Earth satellite is orbiting at a distance from the Earth's surface equal to one Earth radius (4 000 miles). At this location, the acceleration due to gravity is what factor times the value of g at the Earth's surface?
a. There is no acceleration since the satellite is in orbit. b. 2 c. 1/2 d. 1/4
A plano-convex lens is to have a focal length of magnitude 40 cm, and it is made of glass of index of refraction 1.65. What radius of curvature is required?
A) 32 cm B) 26 cm C) 13 cm D) 36 cm