What is the angular speed, in rad/s, of a flywheel turning at 813.0 rpm?
A) 85.14 rad/s
B) 13.53 rad/s
C) 63.84 rad/s
D) 95.33 rad/s
A
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When ice crystals collapse at the surface of ice, the result is a
A) thin film of water. B) slippery surface. C) both of these. D) none of the above
Why are elements heavier than iron less abundant than those that are lighter?
A) because the duration of a supernova is relatively short B) because they tend to be unstable, and easily undergo fission C) Spectral evidence suggests they are only rare here on Earth. D) This is one of the mysteries of cosmic formation that has yet to be answered.
The index of refraction for crown glass, common in eyeglasses, is 1.52. The index of refraction of a particular plastic lens is 1.76. Light bends more in the
A) crown glass. B) plastic lens. C) same speed in each. D) need more information
What would you see if you were on the Moon during a lunar eclipse?
What will be an ideal response?