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A microwave oven is 70 percent efficient if it is supplied with 4000 jouls of electrical energy how much heat is used to actually cooked the food?
Wiki User
∙ 14y ago
A microwave oven does not use heat to cook food like a conventional oven, instead it uses microwaves to cook the food. The microwaves produce the heat inside the food, thereby cooking the food from the inside out.
Wiki User
∙ 14y ago
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