Do you have three temperatures available to operate a carnot machine, 500 * c, 600*c and 700 * c. calculate all the possible efficiencies to determine which is the combination that produces the maximum efficiency.

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Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.