Radiated and absorbed energy

Question 1

What is the relationship between the temperature of an object and the amount of power it radiates?

Answer 1

The hotter the object, the more power it radiates

Question 2

Why does a dull black surface lose energy faster than a shiny one?

Answer 2

A dull black surface is a good radiator of heat and a shiny one isnt

Question 3

When the rate of absorption is greater than the rate of radiation, what will happen to the temperature?

Answer 3

It will rise

Question 4

What is the thermal equillibrium?

Answer 4

It is when the rate of radiation is equal to the rate of absorption and the temperature will remain steady

Question 5

How do you investigate the different rates of heat radiation?

Answer 5

you can compare the temperature over time of a silvered beaker and a blackened one

Question 6

How do you investigate the different rates of heat absorption?

Answer 6

you can use a radiant heater between two plates, one silvered and one blackened, then time how long it takes each plate to get hot enough to melt wax