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Soaking a penny in Coke will clean it (phosphoric acid) and Coke syrup has to be shipped in special chemical containers (again, due to the strong acidity).
Isopropyl, or ethyl, alcohol is a better antiseptic than hydrogen peroxide (H2O2), although alcohol will sting, so be careful.
Pouring salt into boiling water will raise the boiling point of the water slightly and will cook food faster (noodles, etc.).
If you own a computer, and know nothing about them whatsoever, take a few classes on them. Spending over a $1000 on a machine only to ruin it with viruses/spyware is NOT a smart move.
Battery acid (aka 18M Sulfuric acid) is dangerous but can be a lot of fun to play with!
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Brian Griffin: Ah, if my memory serves me, this is the physics department.
Chris Griffin: That would explain all the gravity.
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