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 ___ ___ .
Fill in the following blanks with suitable words :
(a) Sound is caused by
(b) A sound wave consists of places of higher pressure called
(c) Wave speed in metres per second equals frequency in
(d) Sound cannot travel through
(e) The speed of sound in a solid is
(f) When the frequency of the sound is increased, the wavelength
(a) Sound is caused by __vibrattion_ ___ .
(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 ___metre ___ .
(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 ___ decreased___ .
(a) Sound is caused by
(b) A sound wave consists of places of higher pressure called
(c) Wave speed in metres per second equals frequency in
(d) Sound cannot travel through
(e) The speed of sound in a solid is
(f) When the frequency of the sound is increased, the wavelength
