This isn't very ethical advice, but you should tryin use it...
Wherever you can, bullshit answers after getting the feel for them...
Eg. If your timing how long it takes a bob to rotate 20 times around you..
And the exp requires you to do it 5 times over...
Just do the exp twice and make up values for the rest of them...
Everyone probably already does this, but meh...
Oh and, when you're revising tryin remember what the answers to an exp might be...
So that you'll know if you've got a wrong answer for the q's...