Would you want wireless energy?

Answer I think wireless energy is so cool, since transmit power from one end to another end will waste some energy on the cord. wireless energy might be more efficient.

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If space is curved and gravity is not really a force (as per Einstein), how is it that an object can slingshot around a planet and gain kinetic energy Where is the extra energy coming from Which object converts mass to energy; the object or the plane?

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How efficient are solar energy cells and windmills in producing energy for everyday use — JJ, San Antonio, TX?

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Where does energy go when you try to push a heavy object and it doesn't move Thermal energy isn't made, so why do people get tired?

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