Energy Transfer in Different Processes

Which process of energy transfer requires contact between two materials?

a) Torching.

b) Radiation.

c) Convection.

d) Conduction

d

True or False: Convection requires a fluid to transfer the heat energy.

True

Which of the following is the best description of radiation as a method of heat transfer?

a) Atoms collide and transfer heat energy.

b) A fluid moves around to transfer energy.

c) Electromagnetic waves carry thermal energy from one body to another.

d) Energy is instantly transferred from one place to another.

c

True or False: The unit for energy transfer is the joule.

False

The outside of a pot containing hot water also gets hot. This is because of which energy transfer process?

a) Radiation.

b) Conduction.

c) Convection.

d) Not enough information.

b

In which process does heat flow from higher temperature objects to lower temperature objects?

a) Convection.

b) Conduction.

c) Radiation.

d) All of the above.

d

True or False: Microwaves heat up food using the same heat transfer process as a frying pan on a stove.

False

d

True or False: Liquids can only transfer heat through convection.

False

What is the main heat transfer process in space?

a) Convection

b) Conduction

c) Radiation

d) Quantum heat transfer

c

Define the term, conduction.

Conduction is when particles collide to transfer heat from a hotter object to a colder object.

Define the term convection.

Convection is when a fluid is heated and moves away from the heat source, carrying away heat and forcing colder parts closer to the heat source.

Define the term radiation.

Radiation is when an object emits electromagnetic waves which carry away thermal energy.

Fill in the blanks: Heat always moves from _____ to _____.

Heat always moves from hot to cold.