Test Nine!

Test 9

1. How is the thermal energy related to temperature and heat? Thermal energy is heat energy, temperature is a measurement of heat and heat is the transfer of thermal energy.

2. Why do some materials get hot more quickly than others? Different materials conduct heat better than others. Metals are a very good conductor of heat- glass and plastics are not. A metal rod will get hot from one end to the other very quickly, but you can hold one ed of a glass rod while the other end is melting.
3. What are the three forms of heat transfer? Please describe each. Conduction is Heat that is transferred from one particle of matter to another without the movement of the matter. Convection is heat (movement of thermal energy) that is transferred by the movement of currents within a fluid. Radiation is the transfer of thermal energy by electromagnetic waves.
4. How much heat is required to raise the temperature of 5 kg’s of water by 10 K? 209000J
5. Suppose you are camping on a mountain, and the air temperature is very cold. How would you keep warm? Would you build a fire or set up a tent? Write an explanation for each action you would take. Tell whether conduction, convection or radiation is involved with each heat transfer. I would set up a tent because Radiation is the transfer of thermal energy by electromagnetic waves.