Question

Name the phenomena due to which the weight of a body decreases when it is immersed in liquid or gas.

Answer 1

1. According to the Archimedes principle when a body is immersed in a fluid partially or wholly, It experiences a loss of weight.
2. The loss of weight is equal to the weight of the fluid displaced by the immersed part of the body.

Hence, Archimedes' principle is the correct answer.