Q. 404.6( 10 Votes )

Fill in the following blanks with suitable words

(a) Sound is caused by ………….

(b) A sound wave consists of places of higher pressure called ….. and places of …….. pressure called …………

(c) Wave speed in metres per second equals frequency in …………. Multiplied by ……….. in ………

(d) Sound cannot travel through ……….

(e) The speed of sound in a solid is ………… than the speed of sound in air.

(f) When the frequency of the sound is increased, the wavelength …………

Answer :

(a) Sound is caused by vibrations.


(b) A sound wave consists of places of higher pressure called compression and places of lower pressure called rarefraction


(c) Wave speed in metres per second equals frequency in hertz Multiplied by wavelength in meters.


(d) Sound cannot travel through vacuum.


(e) The speed of sound in a solid is greater than the speed of sound in air.


(f) When the frequency of the sound is increased, the wavelength decreases.


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