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Yes. Its not always necessary to have a microwave which goes around.
Microwave Ovens
Conventional ovens and some toaster ovens can be used to bake muffins. You cannot use a microwave oven to bake regular muffins.
Conventional ovens do not reach the temperatures necessary to melt pennies.
No, microwave ovens are extremely popular in Japan.
Microwave ovens primarily heat water (they can heat metal as well, although that is not their purpose), therefore food must contain some moisture in order to be heated in a microwave oven. Dried food will not heat well.
Yes, microwave ovens use electromagnetic radiation.
Some features of cheap microwave ovens are that they can cook things at very high temperatures and some newer microwave ovens even have a convection feaure on them.
No.
No, microwave ovens don't have a standard length. They come in different sizes.
There are no radioactive materials in microwave ovens: they use microwaves to cook food and heat liquids.
Researching the way people use microwave ovens to determine how to improve their design