Question
A stationary railroad whistle is sounded. An echo is heard 5.0 seconds later by the train's engineer. If the speed of sound is 343 m/s, how far away is the reflecting surface?
A stationary railroad whistle is sounded. An echo is heard 5.0 seconds later by the train's engineer. If the
speed of sound is 343 m/s, how far away is the reflecting surface?
A. 68 m
B. 140 m
C. 860 m
D. 1700 m
E. 2000 m
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