Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)
This question is 4 marks so you need to make at least 4 points.
These types of questions just require memorising the 4 points:
Lots of molecules collide with the walls.
The molecules change momentum as they collide with the walls.
Force is the rate of change of momentum.
Pressure = force/area.
Remember these 4 points and you'll get full marks for the question.
JF
Related Physics A Level answers
All answers ▸Describe how emission spectra are formed and how they can be used to identify the elemental composition of a star.
The energy of a photon is 1.5MeV. Calculate the frequency associated with this photon energy and state an appropriate unit in your answer.
How do I find the x and y components of a vector?
Find current and voltage across resistors R1 and R2, when they connected in parallel and in series. A 12V battery is connected, R1=4Ω and R2=3Ω.