Q.16 :-If the amplitude of a vibrating membrane is increased by 50%, then the loudness of sound will increase by
50%
100%
125%
150%

B. 100%

Explanation:

When the amplitude of a vibrating membrane increases the loudness of sound increases. Higher amplitude waves will mean more energy and greater intensity which causes the sound to be louder.

Loudness is proportional to the square of the amplitude. This will simply mean when the amplitude of a wave is doubled, the sound will be 4 times louder.

In this case, 50% increase in the amplitude of a vibrating membrane will cause a 100% increase in the loudness of sound.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

scientific laws are the result of testing theories and proving them to be facts.