Question

if you place your ear closed to an iron railing which is tapped some distance away write your observations give reason​

Answer 1

Answer:

If you place your ear closed to an iron railing which is tapped some distance then you can hear the sound of tapping as solids(especially metals) are very good transmitter of sound even better than air and fluids.

Hope it helps.

Answer 2

Answer:

We will hear the tapping sound twice.

Explanation:

Sound can travel through any medium. But it can travel with higher speed in solids than in liquids and than in gas. So if we tap on the iron rail the sound will travel both through the iron rail and the air. The sound through the iron rail will travel faster than the sound traveling through the air. So we will hear the sound through the iron rail first and the sound through the air second. This will make us feel that we hear the sound twice.