There are 3 ways heat can be transferred: through solids, called , through liquids and gases , called , and through electromagnetic waves, called

Explanation :

The transfer of heat continues untill the two bodies reach thermal equilibrium.

The heat can be transferred in via some processes like conduction, radiation and transfer of energy by changing of phase.

(1) Conduction : It is the transfer of heat via a solid. Heat can be transferred from one solid body to another.

(2) Convection : It is the transfer of heat from one place to another by the movement of fluids. Fluids include both liquids and gases.

(3) Radiation : It is the process of transfer of heat through electromagnetic waves. It is generated by the thermal motion of particles. All matter having a temperature greater than absolute zero emits radiation.

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.