The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration ?

How does the sound produced by a vibrating object in a medium reach your ear ?

Nazima is fly fishing in a stream. The tip of her fishing rod is 1.8 m above the surface of water and the fly at the end of the string rests on the water 3.6 m away and 2.4 m from a point directly under the tip of the rod. Assuming that her rod to the fly) is taut, how much string does she have out(see fig)? If she pulls in the string at the rate of 5 cm per second, what will be the heriozontal distance of the fly from her after 12 seconds.

A string vibrates with a frequency of 200Hz . When its length is doubled and tension is altered , it begins to vibrate with a frequency of 300 Hz . The ratio of the new tension to the original tension is

A passion is listening to a tone of 500 Hz sitting at a distance of 450 M from the source of sound. What is the time interval between successive compression from the source ?

A thin bar magnet vibrates in the horizontal plane with a period of 8 seconds. The magnet is cut into two halves perpendicular to magnetic axis. Then the period of vibration of each half is approximately

The concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes . The average rate of reaction using time in seconds is :