The bob of a pendulum is made of a hollow brass sphere. What happens to the time period of the pendulum. If the bob is filled with water completely? Why?

The bob of a pendulum is made of a hollow brass sphere. What happens t

1.	The bob of a pendulum is made of a hollow brass sphere. What happens to the time period of the pendulum. If the bob is filled with water completely? Why?
Answer» Solution :If the hollow brass SPHERE in COMPLETELY filled with water then time period of simple PENDULUM does not change. This is because time period of a pendulum is INDEPENDENT of MASS of the bob.