Seawater can be purified by the process of -

What is the orbital velocity of the geostationary satellite?

A raised hammer possesses:

Household appliances based on thermal effect of electric current is-

The separation of cream from milk by churning is due to 

The width of a mirror is called the mirror?

Which scientist first melted two pieces of ice by rubbing them together?

The substance which conducts current in the solid state is –