Answer:
i think option C is correct answer
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
<span>If a book is there on the table, no work is done as no distance is covered. If I hold up a book in my hand and my arm is stretched, if no work is being done, where is my energy going?</span>
