Heat a metal can containing wat on an alcohol lamp, boiling that wat, tightening the can lid, cooling the metal can,

Heat a metal can containing wat on an alcohol lamp, boiling that wat, tightening the can lid, cooling the metal can,

Are you asking why it's deformed and uneven? The metal tank will collapse because most of the gas in the tank will be squeezed out by water vapor during heating, and the water vapor will condense into water after being covered and cooled, resulting in lower pressure inside the tank, and the tank will collapse under the atmospheric pressure outside.

Are you asking why it's deformed and uneven? The metal tank will collapse because most of the gas in the tank is squeezed out by water vapor during heating. When the water vapor is cooled, the water vapor will condense into water, As a result, the pressure in the tank becomes lower and the tank will collapse under the atmospheric pressure outside.

Are you asking why it's deformed and uneven? The metal tank will collapse because most of the gas in the tank will be squeezed out by water vapor during heating, and the water vapor will condense into water after being covered and cooled, resulting in lower pressure inside the tank, and the tank will collapse due to the external atmospheric pressure.

Can the stainless steel lunchbox be heated in the microwave

Absolutely not. Because the microwave will hit the metal, so that the food in the inside can not be heated. Use wood or glass, polymer containers can be, but not metal.

Absolutely not. Because the microwave will hit the metal, so emitted, so that the food in the inside can not be heated. Use wood or glass, polymer containers can be, but can not use metal.

It was absolutely not allowed, because microwaves would emit when they touched metal, so the food inside could not be heated. Wood or glass, polymer utensils could be used, but metal could not be used.