Because hot air expands
they are useful because they help you heat up stored food that has been frozen and they are harmful because you have to watch what you put in it because it can blow up.
Microwaves
actually i think they are not because roaches can survive nuclear bombs so i think microwaves will be no prblem
did not blow up
To warm-up foods !
Mercury did not blow up.
You get a bomb then blow it up! But why?
how to blow up a bloon
No, airplanes do not have microwaves on board for heating up food. Instead, they use ovens or hot plates to heat up meals for passengers.
No, wood does not absorb microwaves as effectively as food or liquids do. Microwaves are designed to excite water molecules in food, causing them to heat up. Wood contains very little water, so it is not a good absorber of microwaves.
Microwaves are a form of electromagnetic radiation, not matter. They are characterized by their wavelength in the electromagnetic spectrum and are commonly used in cooking and communication technologies.
because they heat up your food