How can you make a pop can implode?
Pressure! Here Matt puts a hot pop can into cold
water, and it collapses. Read below to see why.
Here's the story...
You start out with an "empty" pop can. Actually,
it does have air particles bouncing around inside...
Particles are spread out the same inside and outside
the can.
Dont forget, all the air particles are moving!
(red arrows) This causes pressure. For now pressure inside equals pressure
outside...
If you heat the air inside the can, the particles speed
up, and many are forced out of the can...
The can is not crushed yet because the fast particles
inside are still balancing the many slow particles outside...
If you cool the air in the can, the particles slow back
down...
But the room still has normal air, so the room air can
crush the can...
NOTE: Above, Matt had to put the can into
the water ! Otherwise, room air would have
just rushed back inside and the can wouldn't have collapsed.
We used the water as a seal to stop the room
air from getting in.
As you can guess, the can did suck up a bunch
of water as the particles inside slowed down.
