Two sounds of very close frequencies 510Hz and 514Hz are produced simultaneously. What is the frequency of resultant sound? How many beats can be heard in 5sec?

Explanation

Here, `v_(1)=510Hz, v_(2)=514Hz.`
Resultant frequency,
`v=(v_(1)+v_(2))/(2)=(510+514)/(2)=512Hz`
No. of beats `//` sec `=514-510=4`
Beats heard in 5sec `=4xx5=20`