To understand this, you need to know a little about how microwave ovens work, and for that we'll need to make a brief detour through physics and chemistry.
Temperature can be thought of, basically, as a measure of the average kinetic energy of molecules. Faster movement of the molecules means more kinetic energy and therefore a higher temperature.
Microwave ovens, however, don't directly make the molecules move faster. Instead, what happens is that molecules have certain specific frequencies of radiation that they absorb, which makes them vibrate and/or rotate in particular ways. Each molecule has a different "fingerprint" of radiation it absorbs, and analytical chemists can use this to study the absorption spectrum of a molecule in a particular frequency range and determine what the molecule is (in practice, it's more a matter of ruling out certain possibilities ... "This molecule can't have a -CH2- group, because it's missing the characteristic asymmetric stretch absorption frequency of that group").
In a microwave oven, we don't care so much about identifying molecules. What we're trying to do is get them to vibrate and/or rotate so fast they bump into their neighbor molecules and give them, effectively, a good hard "kick" to get them moving faster.
Microwave ovens have their klystron (the thing that emits the microwaves) tuned to emit in a frequency range that water absorbs strongly in. This works great for meats and veggies and soups and things like that, which contain high percentages of water. It works less well for certain other things, but it's safe to assume that most things you're going to eat have at least some water in them.
The frequency range also has some other absorption bands. Proteins, for example (something else that's probably in a lot of foods) absorb in the same region.
And here we get to bowls. Most bowls are made of materials that do not have strong absoprtiopn bands in the particular frequency range that microwave ovens use, so they heat up mostly because they're touching the stuff inside that is absorbing the microwaves (and getting "kicked" occasionally by those molecules).
Some kinds of plastics, though, are made from something that's chemically similar to proteins ... specifically, they contain amide groups, which is one part of the protein that absorbs in that frequency range. An example of such a plastic would be melamine (remember a few years ago when melamine was found to be a contaminant in certain foods from China? It was being added because it's similar enough to protein to "fool" the tests, so low-protein milk could be passed off as higher quality high-protein milk). Bowls made from melamine can get quite hot indeed in a microwave, because they're absorbing the radiation directly, not just being heated by the stuff inside.
And this is basically the reason. The bowl that's getting hot most likely has an absorption band in the microwave oven's frequency range, and the bowl that isn't getting as hot probably doesn't.
It depends. Some doors may be hotter than others.
Because they are hot. Because they have something wrong with their body. Because some people are used to the temperature.
Heat is the average kinetic energy (or energy of movement) of the atomic or molecular constituents of the substance in question. On the sub-microscopic scale, everything vibrates, and the faster the vibration, the higher the temperature. If you have two objects of the same temperature but one feels hotter than the other, it is because the one that feels hotter is a better conductor of heat. If the heat flows faster, the object will feel hotter.
I'll assume that you're talking about the kitchen appliance that cooks with microwave radiation, called a "microwave oven" Many parts of the appliance are made with plastic, glass, and rubber. Some of those parts conduct heat, and others don't. None of them conduct electricity. Other parts are made with metals. Those parts do conduct heat and electricity. No, a microwave is not a conductor producing heat, its actually a glass tube, that transfers electric energy into an electromagnetic wave, which happens to excite water molecules.
You didn't say what the bowls were made of, but you could try either heating or cooling the bowls. You could also try blowing cornstarch down between them to lubricate them, or soaking them in soapy water.
Most plastic bowls are safe in the microwave. It is best however to check before use as some will melt. On the bottom of all plastic dishes it should tell you if it would be safe.
mari
Many countries in the world are a lot hotter than others. Generally the closer to the equator a country is, the hotter it will be.
Yes they are. Some are hotter than others.
Yes they are. Some are hotter than others.
It depends. Some doors may be hotter than others.
Some parts of Brazil are hotter than others due to size of Brazil. Brazil is large and as a result it stretches over different climatic zones this results in difference in temperature.
because some animals live in water and there blood is colder
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.
Measuring spoons and a mop are kitchen things. Additional kitchen things include muffin pan, mixing bowls and microwave.
Yes it is possible, but the results are not great, most microwave ovens have 'hot spots' some parts of the cake would cook quicker than others.
Some people might say Kristen Stewart is hotter than Dakota Fanning because they like her darker hair color and personality. Others may say Dakota Fanning is hotter because she is a blonde.