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Q1. Calculate the critical radius of insulation for glass fiber, [k=0.043W/mC] surrounding a sphere and exposed to room air at 20C with h=2W/m2C. Calculate the

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Q1. Calculate the critical radius of insulation for glass fiber, [k=0.043W/mC] surrounding a sphere and exposed to room air at 20C with h=2W/m2C. Calculate the heat loss from a 150C, 7-cm-diameter sphere when covered with the critical radius of insulation and without insulation

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