Physical Science 16.3

Fill in the Blanks

Fill in the Blanks

Multiple Choice

The price of machine A is $300 more than the price of machine D. If the family uses a machine for 10 years, which one costs less overall? (Hint: Add the price to the operating cost for 10 years.)

• A

• D

Multiple Choice

Another family uses a gas water heater. Which machine should this family choose?

• A

• B

• C

• D

Multiple Choice

Only about one-third of the energy in gasoline is converted to work in an internal combustion engine.  The rest of the chemical energy is

• lost as unused mechanical energy

• destroyed by the engine

• converted to potential energy

• discharged as waste heat

Multiple Choice

How is a room heated by an electric baseboard heating system?

• conduction and convection only

• conduction and radiation only

• convection and radiation only

• conduction, convection, and radiation

Multiple Choice

Forced air heating systems are often used to heat many buildings from a central location

• true

• false