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MCAT Question A Day - 9/15/13 - Answer!

At 0°C, approximately how long does it take sound to travel 5.00 km?

A.  15 s
B.  30 s
C.  45 s
D.  60 s

The correct answer is (A). At 0°C the speed of sound in air is 330 m/s; therefore, it takes:

(5.00 * 103 m)/(330 m/s) ~ 15 s

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