Question

After drawing air from an empty metal can and closing it tightly, it was noticed that the can was completely smashed. Why?

Answer 1

The extremely low pressure of the partial vacuum inside the can made it possible for the pressure of the air outside the can to crush it.

Answer 2

The extremely low pressure of the partial vacuum inside the tank allows the pressure of the air outside the tank to crush it. When the pressure outside is greater than the pressure inside, and the pressure difference is greater than the can can withstand, the can will be crushed.