heat radiation

Question 1

what state does conduction happen in?

Answer 1

solids

Question 2

what state does convection happen in?

Answer 2

liquids and gases

Question 3

what can infrared radiation be emitted by?

Answer 3

solids, liquids and gases

Question 4

what factor increases the speed of energy transfer by heating?

Answer 4

temperature difference between a body and its surroundings

Question 5

what does an object that’s hotter than its surroundings do with radiation?

Answer 5

it emits more than it absorbs so it cools down

Question 6

what does an object cooler than its surroundings do with radiation?

Answer 6

it absorbs more radiation that it emits so it warms up

Question 7

what type of surfaces absorb infrared radiation?

Answer 7

dark, Matt

Question 8

what type of surfaces emit radiation?

Answer 8

light, shiny

Question 9

what type of surfaces reflect radiation?

Answer 9

light, shiny

Question 10

why do solar hot water panels contains water pipes under a black surface?

Answer 10

so radiation from the sun is absorbed by the black surface to heat the water in the pipes, the water can be used for washing or pumped into radiators to heat the building

Question 11

what is heat radiation?

Answer 11

the transfer of heat energy by infrared radiation