Chapter 16- Heat Transfer (Homework) – Flashcards
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1. Wood conducts heat very poorly- it has a very low conductivity. Does wood still have a low conductivity if it is hot?
A. Yes
B. No
2. Could you quickly and safely grab the wooden handle of a pan from a hot oven with your bare hand?
A. Yes
B. No
3. Although the pan handle is hot, does much heat conduct from it to your hand if you do it quickly?
A. Yes
B. No
4. Could you do the same with an iron handle?
A. Yes
B. No
Explain.
answer
A. Yes
A. Yes
B. No
D. No
Because wood is a good insulator (poor conductor of heat), grasping an iron hand of the same temperature would surely burn your hand.
question
Both black and white road surfaces absorb sunlight, At the end of a clear night, the warmer road surfaces will be:
A. The white surface
B. Neither as there is no difference.
C. The black surface
answer
A. The white surface
question
The planet Earth loses heat mainly by:
A. Radiation
B. Convection
C. Conduction
answer
A. Radiation
question
An object will normally be a net radiator of energy when its temperature is:
A. Neither of these
B. Higher than its surroundings
C. Lower than its surroundings
answer
B. Higher than its surroundings
question
Your feet feel warmer on a rug than on a tile floor because the rug:
A. For the same mass has more internal energy than tile.
B. Is usually warmer than tile.
C. Is a better insulator than tile.
D. None of these.
answer
C. Is a better insulator than tile.
question
Many tongues have been injured by licking a piece of metal on a very cold day. The heat is transferred from their tongue allowing it to freeze to the pole by a process of:
A. Convection
B. Conduction
C. Radiation
D. All of these
E. None of these
answer
B. Conduction
