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Heat Energy Transfer in Hot Cocoa Cups

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Questions and Answers

What is the primary mechanism of heat transfer in a metal rod?

Conduction (correct)

Insulation

Radiation

Convection

Why are metals considered good conductors of heat?

Due to their high density

Due to their low thermal conductivity

Due to the presence of free-moving electrons (correct)

Due to their high thermal expansion

What happens to the density of water molecules when heated?

It decreases (correct)

It becomes zero

It increases

It remains the same

What is the primary mechanism of heat transfer in a pot of water?

Convection Signup and view all the answers

Why are radiators effective in heating houses?

Due to convection Signup and view all the answers

What is the global conveyor belt characterized by?

Continuously circulating deep-ocean currents due to temperature and density Signup and view all the answers

How does heat transfer occur through radiation?

Through electromagnetic waves Signup and view all the answers

Why is it possible for heat from the sun to reach the planet?

Due to radiation Signup and view all the answers

What is characteristic of good insulators?

They contain pockets of air in their structure Signup and view all the answers

What is the primary reason why a wooden stick is considered a good insulator?

It inhibits the flow of heat Signup and view all the answers