thermal physics

Question 1

what is heat

Answer 1

amount of energy that is being transferred from a region of higher thermal energy to a region of lower thermal energy

Question 2

what is temperature?

Answer 2

measurement of how cold or hot an object is

Question 3

Heat and temperature: SI UNITS

Answer 3

heat: joule (J)
temperature: kelving (K)

Question 4

convection

Answer 4

transfer of thermal energy from one place to another by the physical movement of a medium

Question 5

radiation

Answer 5

transfer of thermal energy from hotter body to a cooler body without need for medium

emitted from heart source in all directions and can pass through vacuum

body can absorb radiation or reflect some portion of radiation

Question 6

factors affecting radiation

Answer 6

colour, texture of a surface
surface temperature
surface area of an object

Question 7

absorbers and emitters

Answer 7

Dull, black are good absorber and good emitter of radiation

Shiny, White, Silvery are poorer absorbers and poorer emitters of radiation