Q6 of 50 Page 12

Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer spece).

The type of waves which are used by astronauts to communicate with one another on moon (or in outer spece) are radio waves.

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4

Which wave property determines

(a) Loudness


(b) Pitch?

 5

How are the wavelength and frequency of a sound wave related to its speed?

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A submarine sends a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?

 8

Why are the ceiling of concert halls curved?