Question

(a) ‘Vibrations cause sound. But we do not always get a sound whenever there are some

vibrations.’ Describe an activity to justify this statement.

(b) ‘Measurements of speed of light and sound tell us that light propagate very fast as compare

to sound.’ Mention one natural phenomenon to illustrate this statement.​

Answer 1

Explanation:

take a glass of water and a balloon just tap the balloon you will not hear the sound of you hold the in your hand and tap but if you hold the water glass probably it sounds when you tap