Waves questions | form four Physics

Explain briefly why sound produced in a hall with many people is heard more clearly
than when the hall has a few people.

Answer / Solution

UNSOLVED

A person standing 99 m from the foot of a mountain claps his hands and hears an echo
0.6 seconds later. Calculate, the speed of the sound in the air.

Answer / Solution

UNSOLVED

Explain what is meant by ‘beats’ as applied to sound

Answer / Solution

UNSOLVED

Briefly explain how beats are formed.

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UNSOLVED

A vibrating string is sounded with a 288 Hz tuning fork and 3 beats are counted per
second. The string is then loaded with small amount of plasticine and 2 beats are counted per second.
(i) What is the frequency of the string?
(ii) What is the frequency of the loaded string?

Answer / Solution

UNSOLVED