Water Sucking Glass
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@EZYMAN123 dont bullshit.
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When I did this I put the cup right over as the match was lighting.
I was under the impression that the burning gas caused a vacuum, which it did.
I don't understand what everyone is arguing about. I didn't know that youtube commentators were all physicists.
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@PlayboyHZ ... RIGHT AFTER the glass is placed and the fire dies the Pres. inside is STILL the atmospheric P, but once the gas inside cools down it TRIES to take up less space (that you got wrong) but CAN'T beacause there's no more air to drag in (constant volume) so the P inside decreases instead, causing the atmospheric pressure outside (being higher) to push the water into the glass.
The air inside eventually takes up less space,but only after the air outside pushes some water in.
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@Adrianrff You're wrong too. The reason this occurs is because the flame heats the air around it causing the molecules to move faster and take up more space, when the cup is placed around it, and the flame runs out of oxygen the flame goes out, and then the air cools causing the molecules to slow down, and take up less space. The water then takes over the space that was gained, and moves into the cup
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@EZYMAN123 nice
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@EZYMAN123 i think your a liar
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i tried it with a whole pack of matches and the glass blew up!!
EZYMAN123 2 years ago 30
You're wrong too, that's a common mistake. It's not "trying to suck oxygen". What creates the low pressure inside are the heated gases increasing its density when cooling down after the fire dies (because of the absence of unburned oxygen), and reduces pressure. Surrounding air, being at a higher pressure pushes the water into the glass.
PV = NRT Basic gas law. Look it up, and Think before calling anyone a dumbass, you got it wrong too
Adrianrff 3 years ago 23