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
(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