Transmission of heat

in microwave the food is heated due to ———-

• Conduction

• Radiation

• Convection

The fastest mode of transmission of heat is—————

• Conduction

• Convection

• Radiation

• Both (1) and (2)

The candle will slowly heat the metal rod and transfer the heat directly to the man’s hand

• Convection

• Radiation

• Conduction

A group of friends gather around a fire to stay warm

• Conduction

• Convection

• Radiation

The sun shines down on this family as the play on the beach.

• conduction
• convection
• radiation

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of the following is an example of convection?

• A hair dryer is drying your hair.

• When an iron is used on your clothes.

• When a car engine turns hot after being turned on.

• When you are boiling water in a pan and hot water rises.

The diagram represents the movement of the mantle under the earth's crust. Which process is represented by the diagram?

• rotation
• conduction
• radiation
• convection

In a vacuum flask, which methods of heat transfer is / are prevented by the vacuum?

• Conduction only

• Convection only

• Conduction and convection

• Conduction, convection and radiation

Why are cooking utensils usually fitted with plastic or wooden handles?

• Plastic and wood are good conductors of heat.

• Plastic and wood are poor conductors of heat.

• Plastic and wood are very dense.

• Plastic and wood are poor insulators.

When a student immerses their hand in cold water for two minutes before transferring that hand to room temperature, the student perceives that

• the water is warmer than it really is because heat is transferred to their hand and the receptors under the skin register the change in skin temperature

• the water is colder than it really is because heat is transferred to their hand and the receptors under the skin register the change in skin temperature

• the water is warmer than it really is because heat is transferred out of their hand and the receptors under the skin register the difference in room temperature

• the water is colder than it really is because heat is transferred out of their hand and the receptors under the skin register the difference in room temperature