Heat Transfer Concepts

Front

A material in which thermal energy moves easily is a(n) _____

Back

conductor

Front

Which statement is true about radiation?

Back

Electromagnetic waves transfer radiant energy

Front

Which of the following processes requires no medium to transfer heat?

Back

Radiation

Front

What type of heat transfer is responsible for the transfer of heat from the sun to Earth?

Back

Radiation

Front

What is the thermal transfer taking place at the handle A, made of metal?

Back

Conduction

Front

What is the thermal transfer taking place at the water B?

Back

Convection

Front

What is the thermal transfer taking place at the waves reaching point C?

Back

Radiation

Front

What is the thermal transfer taking place at the metal base of the pot?

Back

Conduction

Front

Explain how the water at the top gets hot although the heat is supplied at the bottom.

Back

The metal base of the pan conducts heat to the water at the bottom. The hot water at the bottom expands and becomes less dense than the water on the top. This difference in densities within the water drives convection currents. The warmer water moves upward and the cooler water at the top sinks to the bottom, gets heated and rises. The process continues until the water reaches equilibrium.