P14

Question 1

density=

Answer 1

mass/volume(cubic metre)

Question 2

specific heat capapcity

Answer 2

energy required to raise 1 kg of the material by 1 degree celsius

Question 3

specific latent heat

Answer 3

amount of emergy required to change state of 1 kg of materusl without chnagimg its temp

Question 4

change inthermsl energy=

Answer 4

mass x specific heat capacity x chnage in temp

Question 5

thermal energy for a chnge of states=

Answer 5

mass x specific latent heat

Question 6

reduce unwanted trsmfers with insulation

Answer 6

-cavity walls where ijnsuloating material is nbetween gapsm in walls so reduces trssmfer by reducinmg the loss by aiur circulating so oses less by convection

Question 7

effect of diff temps on gas presure

Answer 7

pressure =force/area
pressure increases as temp increeases because particles travel faster and have more energy so colloide more and with ,more force and walls of container

Question 8

absolute zero and kelvin and celsius

Answer 8

0=-273(no particle movement)
c–>k add 273 and vice versa

Question 9

any pressure of gas…

Answer 9

produces a net force at right angle to any surface