I hate physic

Soooo..... we have a physic test tomorrow... how awesome!
No, seriously this is pain, I'm totally lost, I hate this. It feels like I've got more stupid while growing older, wtf ?!
I've talked with Elin in the phone for more than a half hour and I still don't get it! Of course I'm a little bit smarter now but not smart enough. I need help with this crap, but it's a liittlleee too late :P