definitions

Question 1

specific heat capacity

Answer 1

the energy required to raise 1kg of a substance by 1Cn

Question 2

power

Answer 2

the rate at which energy is transferred or the rate at which work is done

Question 3

work done

Answer 3

force acts over a distance

Question 4

national grid

Answer 4

a system of cables and transformers linking power stations to consumers across the UK

Question 5

internal energy

Answer 5

energy which is stored by particles within a system
the energy takes the form of kinetic energy and potential energy

Question 6

specific latent heat of fusion

Answer 6

the amount of energy needed to change the state between solid and liquid of 1kg of a substance without a change in temperature

Question 7

specific latent heat of vaporisation

Answer 7

the amount of energy to change the state between liquid and gas of 1kg of a substance without a change in temperature

Question 8

ionising radiation

Answer 8

ionisation is the process of atoms or molecules becoming charged
this is done through loss/gain of electrons

Question 9

irradiation

Answer 9

the process of exposing a material to α, β or γ radiation
doesn’t make the material/object radioactive, but it can kill living cells
also can be a method of sterilisation

Question 10

contamination

Answer 10

the unwanted presence of materials containing radioactive atoms on other materials
when a person has radioactive material in/on them
object/person becomes radiotactive