Question

How Does a physicist calculate the Volume of a cat if cat's density is unknown?

Answer 1

According to the question the density of the cat is undefined, and we know density is the ratio of mass of the object to volume of the object.

Now we cannot determine the exact volume of the cat,as a cat is of irregular shape, it does not have a perfect mathematical figure or shape so we cannot determine the volume of the cat.

Thus make use of the Archimedes principle.

So we need to immerse the cat in the water and mark the reading of the amount of water displaced due to immersion of the cat in water.

The amount of water or volume of water displaced will be equal to the volume of the cat.

Archimedes principle is used to determine the volume of irregular shaped bodies which cannot be determine by conventional methods.