Why does the thermos bottle pop out?
When you from the thermos poured a cup of boiling water, and then put the cork cover up, cork will bang jump. Originally, when you stopper, a cold air drilling with thermos
The air has properties of expansion and contraction, the cold air into the thermos bottle, the volume will be expanded, but it is not a bottle cap tightly after the free expansion, so the cork by gas pressure, when the pressure to a certain extent, the cork was the top out. The cork cover more tightly, the volume of gas in the bottle the pressure is smaller, so its pressure is greater, a jump higher, the greater the sound.
Because the hot water bottle of gas heating, gas for heat expansion, but the volume of hot water in the bottle is certain, it will lead to increased pressure, and thus impact the thermos bottle walls, and is the weakest link, when the pressure in the thermos bottle than outside the bottle, a certain value. The cork could not stand up, it will jump out, release the high-pressure hot water bottle
