Give scientific reason:In earlier times, people used to listen for the

1.	Give scientific reason:In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rails.
Answer» 1. It was a technique that worked better in those days when train speed were slower than they are today and when there were more rail joints. 2. When people would put their ear to the rail they could hear vibration caused by the wheels moving over the joints. 3. Metal being a solid is an efficient medium for the sound to travel and so the sound can propagate further in the rail than would in air as speed of sound is faster in solids than in air.

Give scientific reason:In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rails.

Answer»

1. It was a technique that worked better in those days when train speed were slower than they are today and when there were more rail joints.

2. When people would put their ear to the rail they could hear vibration caused by the wheels moving over the joints.

3. Metal being a solid is an efficient medium for the sound to travel and so the sound can propagate further in the rail than would in air as speed of sound is faster in solids than in air.

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Give scientific reason:In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rails.

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