Question

Topic : Heat

1. Why can anyone put their fingers beside the flame of a lit candle without getting burned, but not above the flame?

2. What is the purpose of putting holes near the top of a metal lampshade?

3. A metal spoon is placed in one of two identical cups of hot coffee. Which cup will be cooler after a few minutes?

Answer 1

1.You can hold your fingers beside the candle flame without harm,but not above the flame.
Why? Answer: Heat travels up by convection.

2.Answer: The holes are put on the top of metal lampshadeTo flow the gas outdide of the lamp.

3. Answer: Both cups will be cooler in a few minutes. The one with the metal spoon will cool faster (more) than the one without the spoon.



Hope this helps