A sound wave creates oscillation in air at a place 1000 times in 100 secons. Find the time period and frequency.

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Explain the oscillation of a liquid in a U-tube. Find its time period.

A bar magnet suspended freely has period of oscillation of 2s. Now, the bar magnet is broken into equal halves and one-half is suspended to oscillate freely in the same magnetic field. Find the time period of oscillation of this half of the magnet.

A bar magnet is oscillating in the earth's magnetic field with a time period T. If the mass is quadrupled, then its time period will be: