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7 0

Microwave~Inside the strong metal box, there is a microwave generator called a magnetron. When you start cooking, the magnetron takes electricity from the power outlet and converts it into high-powered, 12cm (4.7 inch) radio waves. ... Thus the microwaves pass their energy onto the molecules in the food, rapidly heating it up

Radio~ The radio waves transmitted and received by wireless computer networks are at much higher frequencies than those used by other device

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The power developed is 500 W ( to the nearest Watt)

Power(P) is the rate at which work is done. Work done (W) is the product of the force applied on the object and the displacement (s) made by the point of application of the force.

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Therefore,

$P=\frac{F*s}{t}$

Substitute the given values of force , displacement and time

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