P1

Question 1

what is a thermogram used for?

Answer 1

measuring heat

Question 2

when the temperature of a a body increases the average ……….. ………. of the particles increase

Answer 2

Kinetic energy

Question 3

what is specific heat capacity used to measure?

Answer 3

the energy to raise the temperature of 1 kg by 1 C 1

Question 4

mass X specific heat capacity X temperature change =

Answer 4

energy transferred

Question 5

what is specific latent heat is

Answer 5

the amount of energy needed to change the state of 1 Kg of a material

Question 6

mass X specific latent heat

Answer 6

energy transferred

Question 7

when a substance changes state why is there no change in temperature (eg from solid to liquid to gas)

Answer 7

because all the energy is needed to break bonds that hold the molecules together

Question 8

what is conduction

Answer 8

the transfer of energy through particals

Question 9

what is convection

Answer 9

when partials with more energy rise to make room for the cooler particlas

Question 10

what is radiation

Answer 10

is the transfer of heat through electromagnetic waves and can unlike the others CAN travel through a vacume

Question 11

mass/volume=

Answer 11

density

Question 12

useful energy output X 100%/

total energy input

Answer 12

efficency

Question 13

what is wavelength

Answer 13

distance between two successive points of a wave

Question 14

frequency

Answer 14

the number of complete waves passing a point in one second

Question 15

wave speed =

Answer 15

frequency X wavelenght

Question 16

the magnetic spectrum starting at the one with the longest wavelength

Answer 16

radio waves, microwaves, infrared radiation, visible light, ultra violet, x-rays, gamma rays