Originally posted by: DrPizza
Originally posted by: iamwiz82
Originally posted by: Minerva
Originally posted by: Mwilding
Originally posted by: Minerva
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cool, how do you make one?
Dry ice pellets + warm water + coke bottle. Run like hell after screwing lid on tight!
Remember at 90F the pressure can theoretically reach 1050 psig! I don't know what the average rupture pressure of your typical 2l coke bottle is but even if it's a few hundred psig the sudden release of energy is violent and can break fingers and send flying plastic shrapnel in all directions for a few yards. Not as dangerous as a pipe bomb but not something you want to put under someone's bed either.
Although sometimes I wouldn't mind a medicine bottle size one in my brother's computer.
Mythbusters tested plastic bottles once. I forget the exact figure, but I think it was around 150psi for two liters, significantly less for those large water jugs that go on a stand..
In physics class, toward the end of the year as a fun project, I have students make rockets that are powered by a 2-liter bottle about half filled with water and pressurized to 100psi. All the resources I've seen point to about a 150 or 160 psi bursting pressure.
For any idiots/morons/retards who think it's fun to pressurize 2-liter bottles until they rupture, let me tell you something: I had a 2-liter bottle pressurized with 100 psi of air. I had it below a lab bench in my classroom. The 2 liter bottle shot THROUGH a piece of 1/4 inch 3-ply plywood. It was quite obvious that if that piece of plastic had hit anyone in the head, they'd have ended up in the hospital. I also have, on my school computer, some graphic pictures of an aforementioned idiot/moron/retard who was injured by a 2-liter bottle that exploded too close to him. Head lacerations, and a great big indentation on his head.