Cie igcse physics paper 3

Hi i have my Cambridge IGCSE physics PAPER 3 next week thursday
I am willing to help anyone who has doubts or is stuck
just post your questions and i shall help u

Pressure is best understood through experiments showing brownian motion.

Put a smoke particles in a glass cell, and illuminate it you can see the motion of large smoke particles. They appear to undergo lots of small, random movements. This is because there are lots of small but fast-moving air molecules in the glass cell and the pressure inside is exerted in every direction.

Solids are collections of static particles held strongly in fixed positions around which they vibrate. When particles in a solid have enough kinetic energy they overcome the attractive forces, thus doing work, and can move freely around each other. Same sort of thing happens with liquid molecules when they turn into a gas.

Relationships between Volume, Pressure and Temperature:
Pressure Law (Fixed Volume) - Pressure goes up, Temperature (Kelvin) goes up proportionally
Charles' Law (Fixed Pressure) - Temperature (Kelvin) up, Volume goes up proportionally
Boyle's Law (Fixed Temperature) - Starting Pressure x Starting Volume = New Pressure x New Volume

Sorry for the long-winded explanation but I hope it is of use to someone.