Yesterday, I made an experiment. I filled an empty (but contains air) soda can with a little bit of water. Then I turn on fire at the sides of the soda can so that the water starts boiling. Next, I prepare bucket filled with normal temperature water. And when the water inside the soda can starts evaporating, I quickly turn the SC upside down inside the bucket and then, CRANK! The air pressure made it's effect on the soda can.
However, I don't know why.
I explained it by saying: "The water vapour eliminates the air in the soda can, when we reverse it into the bucket, the water vapour quickly becomes liquid and we have a vacuum now in the soda so the effect of air pressure will be important."
But is it true?