I have a test in chemistry tomorrow on dimensional analysis and i'm completely ****ed! I have no idea what it is! Can someone please explain it for me?

I've already tried to figure it out by using the notes I downloaded from a website, but I still just don't understand how it's set up!

i mean, you know you're really lost when you have to try asking the pit for help...

It's the process of converting between units.
Josh Homme writes the greatest lyrics EVAR:
"I wish we could get away
Drink wine and screw"

"Nicotine, valium, vicodin, marijuana, ecstasy, and alcohol

"I wanna lick you too much"

Own this Black Sabbath shirt?