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A thin square steel plate with each side...

A thin square steel plate with each side equal to 10 cm is heated by a blacksmith. The rate of radiated energy by the heated plate is 1134 W . The temperature of the hot steel plate is (Stefan's constant `sigma = 5.67 xx10^(-8) " watt "m^(-2) K^(-4)` , emissivity of the plate = 1)

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