physics 4

Question 1

what is density equation

Answer 1

m=pV
p=density
m=mass
v=volume

Question 2

difference between particles

Answer 2

solid=all lined up and cant move
liquid=all mushed up together while moving
gas=flying all over the place

Question 3

what is the difference between a physical and chemical change

Answer 3

physical change can be easily reversible and they regain their original properties
chemical change=they are much harder to reverse and do not go back to their original properties

Question 4

what is a boiling point and melting point

Answer 4

the boiling point is the temperature above which a substance is a gas and below which it is a liquid
the melting point is the point below which a substance is a solid and above which it is a liquid

Question 5

what is internal energy

Answer 5

you can raise the internal energy of a substance through heating or forces

Question 6

the differences between a internal and kinetic energy

Answer 6

internal energy is when you heat a substance the energy can go into 2 stores
kinetic energy is the temperature only goes up when the internal kinetic store is increasing

Question 7

does the temperature change when something is changing state

Answer 7

no it does not change it stays the same

Question 8

what is specific heat

Answer 8

specific heat tells you how much energy it takes to heat up an object