Lightning Mate is right.
Fox3, ffs no more of that, it will go to his head and then we'll be right in the deep end.
SI Units. (Expressions to make you sigh)
The way I was tought is that Isaac Newton discovered Gravity when an Apple fell on his head. Four Apples = 1 Pound therefore 1 pound = four Newtons.
Kilowatts is what the Electric fire used to run on and a Litre's like a Metre only better 'cause it's wetter.