Sound travels through a steel rail at 5000 m/s. A train signal sent th…

Question

Sound travels through a steel rail at 5000 m/s. A train signal sent through the rail reaches a distance of 1 km in:

Accepted Answer

C. 0.2 s

Time = distance / speed = 1000 m / 5000 m/s = 0.2 s.
**So the rail signal arrives much faster than an equivalent through air (which would take 1000/340 ≈ 2.94 s).**

Answer

5 s

Answer

20 s

Answer

2 s

Sound travels through a steel rail at 5000 m/s. A train signal sent through the rail reaches a distance of 1 km in:

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