A balloon filled with hydrogen rises in air. explain the reason.

When a hollow steel ball and a solid steel ball of the same size are submerged in water, do the two experience the same upthrust?

The upward force acting on the body immersed in a fluid is called :

A man first swims in sea water and then in river water. Compare the weights of sea water and river water displaced by him.

An object can be completely immersed in a liquid when:

The upward force exerted by a liquid on an object is called _______.

Fill in the blank. 

Write the another name of the buoyant force.

Which one of the following statements is true?