A simple pendulum is oscillating with frequency 'F' on the surface of the earth. It is taken to a depth R3 below the surface of earth (where R = radius of earth). The frequency of oscillation at depth R/3 is:

A pendulum clock that keeps correct time on Earth is taken to the Moon. On the Moon, it will run:

When a pendulum clock is taken to the Moon, its time period increases because the value of acceleration due to gravity 'g' on the Moon is how many times that of the Earth?