# Heat Transfer

## Terms

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What are the UNITS of measurement SPECIFIC HEAT?
J/(kg K) OR J/(g C)
What is CONDUCTION?
The transfer of thermal energy (heat) or electrons (electricity) between particles that are touching.
What is the specific heat of water?
4,180 J/(kg K)
Is wood a conductor or an insulator?
Insulator
What FORMULA is used to calculate a CHANGE IN THERMAL ENERGY?
Change in thermal energy = mass x specific heat x change in temperature

OR

^E = m x cp x ^T
What is the direction of heat flow between substances?
From a substance at a higher temperature to a substance at a lower temperature.
What is SPECIFIC HEAT?
The amount of energy required to raise the temperature of 1 kilogram of a substance by 1 kelvin OR to raise 1 g of a substance by 1 degree Celcius.
Is a gas, such as air, a good conductor or insulator?
Insulator
What is HEAT?
The movement of thermal energy from a substance at a higher temperature to a substance at a lower temperature.
How does radiation differ from conduction and convection?
Radiation can travel through a vacuum. Conduction and convection both require a medium to move through.
What is a CONDUCTOR?
A substance through which electrons move freely, transmitting heat or electricity.
Are ceramics and tiles good conductors or insulators?
Conductors
What form of heat transfer is used to heat food using a heat lamp or roast marshmallows and hot dogs?
What is CONVECTION?
The transfer of thermal energy by the movement of currents in a fluid (liquid or gas).
How does fiberglass behave as an insulator?
A tangle of thin glass fibers traps air. Air is a poor conductor of heat and trapped air can not transfer heat by convection.
Is plastic a conductor or an insulator?
Insulator
Are metals good conductors or insulators?
Conductors