A traffic light weighing 100 N is supported by two ropes as shown in the figure. The tensions in the ropes are closest to
A) 50 N.
B) 56 N.
C) 63 N.
D) 66 N.
E) 83 N.
Answer: E
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The phase of the Moon on a particular night is determined by
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The intensity of a sunspot is found to be 3 times smaller than the intensity emitted by the solar surface. What is the approximate temperature of this sunspot if the temperature of the solar surface is 5800 K?
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Which large jovian moon is thought to have been captured into its present orbit?
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To change the fundamental frequency of a guitar string, you can
A. strum it over the sound hole. B. do nothing short of using a completely different guitar. C. use something other than a pick. D. make it shorter, by pressing a finger of your left hand on the string.