Rohit is trying to tune an instrument. he strikes a tuning fork and then plays a note that almost matches it. rohit hears the volume of the two waves beating, which sounds like "wah-wah-wah-wah."

The number of "wah"s every second is the difference between the frequencies of the tuning fork and the note he is playing.

you have to draw the persons position over there

choosing tennis and golf balls is your inde choice.

their mass and volume are dep