Asecond's pendulum is taken to the moon. what will be the time period of the pendulum at the moon? (acceleration due to gravity at the surface of the moon is 1/6 on the surface of earth).

4.89 seconds

Explanation:

The time period of a pendulum is given by

For a second pendulum on earth, T = 2 second

    ...... (1)

Now the time period is T when the pendulum is taken to moon and gravity at moon is 1/6 of gravity of earth

   ...... (2)

Divide equation (2) by equation (1)

T = 4.89 seconds

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force