Because the microwave will heat up the particles inside the can. Therefore these particles will have more movement energy and the pressure inside the can will build up, causing it to explode. Please post a message on my message board if thes helps! - Chibi Nanas x
because the air inside it expands with heat and has nowhere to go,
As the container heats, it fills with water vapor. This will force (or just move) the lid off. Always have a little gap for the steam (water vapor) to leave.
not necessary
Some plastic tubs are microwave proof whilst others are not. The tub should have writing on it or a label that it came with to indicate if it can be put in the microwave. If you can put it in the microwave remember to remove the lid slightly or completey.
Anybody can microwave - all you do is put the food in and set the timer correctly.
salad can not be cooked in the microwave.
you can, but you can't put a cup of water in it.
sweat
Yes you can. You cannot though if it's a microwave oven, and you cannot put on the oven itself, only as a lid for a pan etc.
I use a glass jar with a screw on lid. It can be frozen and put into the microwave with the lid off to thaw. So, there are several advantages using the jar.
yes.
It is not usually nesessary to put a cover on food in the microwave oven. Some people cover food to prevent soiling the inside of the oven.
You can heat any food in an over that you would in a microwave, you'll just have to put it in an ovensafe container. For example, you can't put plastic in the oven but it works in a microwave.
you give it dog food and put it in the microwave then give it to them