We did this with milk jugs back in the 70's. Just pour a few cups of boiled water into a jug (with a funnel) and then cap it. Can let it cool naturally, or dunk it into a sink of cold water. The jug will collapse as the heated air inside the jug cools and contracts.
It happens because of air pressure. Water in the can turns to steam when heated. As the steam rises, the number of molecules left in the can decreases. Turning the can upside down with the opening below the water line in the pan assures air molecules cannot rush back into the can as it cools. As the water vapor in the can begins to cool, it condenses, creating a partial vacuum. The pressure outside the can is normal air pressure, while the pressure inside is significantly lower.
We did this with milk jugs back in the 70's. Just pour a few cups of boiled water into a jug (with a funnel) and then cap it. Can let it cool naturally, or dunk it into a sink of cold water. The jug will collapse as the heated air inside the jug cools and contracts.
FloatingJetsam 3 days ago
It's a song by Blockparty called Banquet.
baldurraudi 2 months ago
can anyone tell me the name of the song on the background?
lupckya 2 months ago
It happens because of air pressure. Water in the can turns to steam when heated. As the steam rises, the number of molecules left in the can decreases. Turning the can upside down with the opening below the water line in the pan assures air molecules cannot rush back into the can as it cools. As the water vapor in the can begins to cool, it condenses, creating a partial vacuum. The pressure outside the can is normal air pressure, while the pressure inside is significantly lower.
areagan 2 years ago 2
Sweet. That experiment never gets old.
DartmouthAlum96 2 years ago
Why It Happen?
sebastian9317 2 years ago
@sebastian9317
/watch?v=xZdfcRiDs8I&NR=1 this will help explain why it happens.
neverquit250 1 year ago