Thermal Physics

Question 1

what is conduction?

Answer 1

heat that travels through solid

Question 2

why are metals good conductors?

Answer 2

have free electrons that can transfer electrons and heat

Question 3

how is rate of conduction increased?

Answer 3

increase in temperature gradient
increase in surface area
decrease in distance between particles

Question 4

which is faster conduction or convection?

Answer 4

convection

Question 5

process of convection?

Answer 5

fluid heated
particles separate and fluid expands
density decreases
hotter less dense fluids rise and replace colder fluids

Question 6

what is thermal radiation?

Answer 6

radiation emiited from any object above absolute sero
can transfer energy through vacuum

Question 7

what happens when you increase temperature on thermal radiation?

Answer 7

thermal radiation increases

Question 8

what happens when an object emits radiation?

Answer 8

thermal energy of an object decreases

Question 9

are shiny objects good or bad absorbers of thermal radiation?

Answer 9

poor absorbers and emitters

Question 10

are matt objects good or bad absorbers of thermal radiation?

Answer 10

good absorbers and emittes

Question 11

what is specific heat capacity?

Answer 11

energy needed for 1kg of a uni to increase by 1 degree

Question 12

formula for specific heat capacity?

Answer 12

specific heat capacity = thermal energy / (mass*temp change)

j / kg/degrees