The temperature of a piece of iron is 27°C and it radiates energy at the rate of Q kWm'2. If its temperature is raised to 151°C, the rate of radiation of energy will be approximately

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The temperature of a piece of iron is 27°C and it radiates energy at the rate of Q kWm'2. If its temperature is raised to 151°C, the rate of radiation of energy will be approximately






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