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MCAT Question A Day - 9/18/13 - Answer!

In which medium will the speed of sound of frequency 103 Hz be greatest?

A.  Air at 25°C
B.  Water at 25°C
C.  Gelatin at 25°C
D.  Iron metal at 25°C

The correct answer is (D). The frequency of the sound wave is not relevant to the question. Sound waves are fastest in solids. The stiffer the solid, the faster the propagation.