Question

3. One can judge the approaching of train by laying your ears on the railway track.
Explain why?​

Answer 1

Explanation:

One can judge the approaching of train by laying your ears on the railway track because in solids the speed of sound is much faster than in air, hence in solids the sound of the train will approach if it is also much far away, but in air the sound will not be heard as the energy of the sound will dissipitate in the aroundings