Question

(c) Air inside the columns of instruments like flute is made to vibrate to produce sound. They
are called 'wind instruments'. Give the names of four other such instruments.
Ans.
(a)
(c)
(b)
(d) Why do we take our ears close to the railway track to find if the train is approaching? What
does this tell you about the relative speed of sound in air and solid.
Ans.​

Answer 1

Answer:

a)  The vibrating part in a dholak is a stretched membrane.  

(b)  The vibrating part in a sitar are stretched strings.

(c)  The vibrating part in a flute is air column inside it.

Answer By

Explanation:

Answer 2

Answer:

1) Saxophone

2) Oboes

3) Bassoons

4) Clarinets

d) We put our ears close to the railway track to find if the train is approaching because sound waves travel very fast in solid. Their speed is around 5100m/s , sound travel 15 times faster in steel than in air.