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turk
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Traffic shock wave. An abrupt slowdown in concentrated traffic can travel as a pulse, termed a shock wave, along the line of
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Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms
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An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky)
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