Question

If we want to hear a train approaching from far away , why it is more convenient to put th ear to the track ?

Answer 1

as when the train approaches vibrations are felt. so,when we place our ears on the tracks we hear vibrations and we hear a train approaching from far away

Answer 2

It is convenient to hear the sound of an approaching train through the railway track than the air.

Explanation:

Sound travels faster in materials that are denser than air.

This is due to the fact that atoms and molecules in solids are closer to each other than those present in air and therefore transfer the vibrational energy of sound faster than air.

When a train is coming towards us, the sound of the moving train travels both in the iron rails and air. Since the rail tracks convey the sound faster, It would be easier to hear the train by putting an ear to the tracks.