100+ Physics Hydrostatics Questions and Answers - 3

Question: 11

Why liquids and gases called fluids?

Liquids and gases flow freely. So they are called fluids.

Question: 12

State the uses of hydrometers?

Hydrometers are used to find the specific gravity of a liquid and hence the density of the liquid.

Question: 13

What does hydrostatics deal with?

Hydrostatics deals with the equilibrium of liquids.

Question: 14

What is called alchemy?

The art of transmutation of a metal into gold is called alchemy.

Question: 15

What are the sources of water?

Water is present almost in all natural things like plants, animals, rocks and air.

On the surface of the earth it is present in the form of oceans, rivers and lakes.

Water exists above the earth's surface in the form of water vapour, mists and clouds.

Water is present in the form of underground stream, well water and spring water.