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The microwaves excite rotational modes in molecules that have an electric dipole. Water molecules have a dipole because oxygen is more electronegative than hydrogen and the molecules are bent (H-O-H angle about 105 degrees).
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoyou put ti in the microwave and it heats up
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Which property of food is necessary in microwave ovens?
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.
Is there UV in microwave ovens?
No, microwave ovens do not emit ultraviolet (UV) radiation. They use microwave radiation to heat and cook food by causing water molecules in the food to vibrate, generating heat. UV radiation is not involved in the operation of microwave ovens.
Do substances have to contain water in order to be heated in the microwave?
No, substances do not have to contain water to be heated in the microwave. The microwave oven uses electromagnetic waves to agitate the molecules in the substance being heated, causing them to generate heat regardless of their water content.
An experiment tested microwave-heated water to water plants and the plants died. This suggests that the microwave did something to the water to make it harmful. Is microwave heated water harmful?
All a microwave does is send microwaves through objects and speed up the molecules. The reason the plants died is because the water was hot.
What is the resonance frequency for water?
The resonance frequency for water molecules is in the microwave region, around 2.45 GHz. This is why microwave ovens operate at this frequency to efficiently heat food that contains water molecules.
Do microwave ovens emit gamma rays?
No, microwave ovens do not emit gamma rays. They emit non-ionizing radiation in the form of microwaves, which are a type of electromagnetic radiation that heats food by causing water molecules to vibrate, generating heat. These microwaves are specifically tuned to be absorbed by water, fats, and sugars in food.
How do sound waves escape microwave ovens?
Sound waves do not escape microwave ovens. Microwave ovens use electromagnetic waves to heat food by causing water molecules in the food to vibrate, producing heat. These waves are contained within the oven and do not produce sound.
What type of energy movement is used by microwave ovens?
Microwave ovens use electromagnetic energy movement to heat food. They emit microwaves, which cause water molecules in the food to vibrate rapidly, generating heat and cooking the food.
How does a microwave change water?
A microwave heats water by causing its molecules to vibrate rapidly through a process called dielectric heating. This agitation generates heat that warms the water quickly and evenly. This is why microwave ovens are often used to heat food containing water or liquids.
Does a microwave transfer heat by radiation?
Yes, a microwave transfers heat through radiation. Microwave ovens use electromagnetic radiation in the microwave frequency range to heat food by causing water molecules in the food to vibrate and generate heat.
What kind of radiation is given off by microwave ovens?
Microwave ovens emit non-ionizing radiation in the form of microwaves. This radiation heats the water molecules in food, causing them to vibrate and generate heat, which cooks the food. Microwaves are considered safe for use in kitchen appliances.
What kind of simple machine is oven?
A microwave oven, or a microwave, is a kitchen appliances that cooks or heats food by dielectric heating. This is accomplished by using microwave radiation to heat water and other polarized molecules within the food. This excitation is fairly uniform, leading to food being adequately heated throughout (except in thick objects), a feature not seen in any other heating technique.Basic microwave ovens heat food quickly and efficiently, but do not brown or bake food in the way conventional ovens do. This makes them unsuitable for cooking certain foods, or to achieve certain effects. Additional kinds of heat sources can be added to microwave packaging, or into combination microwave ovens, to add these additional effects.Microwaving food raises several safety issues, but also reduces certain risks, such as that of fire from high temperature heat sources.
