please give me answers of 2 ,3,4
Answers
Answer:
2.
• Conductors : A conductor is any piece of material that easily allows heat or electricity to pass through it. Many different materials can be conductors but metals are the best conducting materials that are available to us.
• Insulators : Any material that keeps energy such as heat from easily transferring through is an insulator.
Example of :-
Conductor: Copper, Iron, aluminum,etc.
Insulator: Fiberglass, air, iron fiber,etc.
3.
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. ... This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume.
The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The sea breeze strength will vary depending on the temperature difference between the land and the ocean. At night, the roles reverse. The air over the ocean is now warmer than the air over the land.
4.
Radiant heat, also known as thermal radiation, is the transfer of electromagnetic radiation which describes the heat exchange of energy by photons. Radiant heat is a mechanism for heat transfer which does not require a medium in which it propagates (unlike convection and conduction).Take 2 plastic cups and cover one with black cloth and the other with white cloth and keep these both cups on sunlight for some time, then take a thermometer and put on both cups one by one you will notice that the black plastic cup will be more hotter as black objects absorb more heat.