How many times faster does sound travel through iron rails than through air at 20.° C?
A) 12.8
B) 13.6
C) 13.1
D) 13.9
E) 12.2

Name: How many times faster does sound travel through iron rails than through air at 20.° C? A) 12.8 B) 13.6 C) 13.1 D) 13.9 E) 12.2
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Question

Quizplus · Accepted Answer

The speed of sound in air at 20°C is 343 m/s, and the speed of sound in iron is 5130 m/s. Therefore, sound travels 5130/343 = 13.1 times faster through iron rails than through air at 20°C.

How Many Times Faster Does Sound Travel Through Iron Rails