The brass pendulum of a particular grandfather clock has a mass of 2 kilograms and completes its swing once every 2 seconds.

if you were to replace the brass pendulum with an identically shaped gold pendulum having a mass of 4 kilograms, it would complete its swing once every

2 seconds.
4 seconds.
8 seconds.
16 seconds.

To solve this problem it is necessary to apply the concept of period in a pendulum. Its definition is framed in the equation

Where,

l = Length

g = Gravity

As you can see, the Period is dependent on both the gravitational acceleration and the length of the string. The period does not depend on mass. Therefore the period must remain the same at 2 seconds.

answer: electrons

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