I havent made any notes for phys unit 3b you just need to revise units 1 amd 2 and do as many past papers as you can for that however, i have an edexcel document which has a lot of info about unit 3b, ill post that tomorrow morning, mybee it helps you a bitt. Have you begun revising yet?Do you have for physics??? unit 3b? practical? need it !!