Physics Final

Heat transfer by conduction in metals occurs when

• atoms give off heat in the form of electromagnetic waves.

• large numbers of atoms move from place to place.

• electromagnetic waves travel from one place to another through a vacuum.

• electrons bump into atoms and other electrons.

• none of the above

Plastic foam is a good

• conductor.

• insulator.

• emitter.

• absorber.

• radiator.

Heat transfer by convection occurs when

• electromagnetic waves travel from one place to another through a vacuum.

• electrons bump into other electrons.

• atoms give off heat in the form of electromagnetic waves.

• large numbers of atoms move from place to place.

• none of the above

Heat travels from the sun to Earth by

• conduction.

• radiation.

• convection.

• insulation.

• vacuumization.

Energy transfer by convection is primarily restricted to

• gases.

• liquids.

• solids.

• fluids.

• none of the above

A good absorber of radiation is

• a good reflector.

• a poor emitter of radiation.

• a good emitter of radiation.

• none of the above

A good reflector of radiation is

• a poor absorber of radiation.

• a good absorber of radiation.

• a good emitter of radiation.

• none of the above

The reason light-colored clothes help keep you cool in warm weather is that clothes of light color

• weigh less.

• have a lot of spaces in them.

• reflect a lot of energy.

• absorb energy, leaving little to pass through.

• all of the above

Two pots are filled with boiling water. The pots are exactly the same size, but one pot is white and the other is black. Which pots cools faster?

• The black pot.

• The white pot.

• Neither—they both cool at the same rate.

Infrared radiation is a form of

• microwave energy.

• radiant energy.

• internal energy.

• radio energy.