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Calculate the Biot number for a metal sphere of 6 cm in diameter placed in an air flow. The heat transfer coefficient to air is 30W/(m2 °C). The thermal conductivity of the metal is 300 W/m°C.

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Calculate the Biot number for a metal sphere of 6 cm in diameter placed in an air flow. The heat transfer coefficient to air is 30W/(m<sup>2</sup> °C). The thermal conductivity of the metal is 300 W/m°C.






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