Shin Chan and his mother have a tin whistle each. The pipe length of Shin chan's tin whistle is 52 cm long while the pipe length of mother's tin whistle is 50 cm long. They both play at the same time, sounding the whistles at their fundamental resonant frequencies. They note that they are not in tune with each other. The velocity of sound in air is `325 m//s`. Assume the whistle is a pipe with one end open find the beat frequency (in Hz) that is heard when both whistles are playing simultaneously. (Round off to nearest integer)

Answer

`0006`

Explanation

`v = 325m//s`
`v_(0)=V/(4L) :. V_(10)=325/(4xx0.52)`
`v_(20)=325/(4xx0.50)`
`v_(10)-v_(20)=325/4(1-1/(0.264))=325/4((0.004)/(0.260xx0.264))=0.325/(0260xx0.264)=6.25` Hz