Question: An Aluminum sphere with D = 0.012 m and T = 800 K is exposed to air with T... = 300 K and h

An Aluminum sphere with D = 0.012 m and T = 800

An Aluminum sphere with D = 0.012 m and T = 800 K is exposed to air with T... = 300 K and h = 100 W/m.K. Find the following: a- Biot number b- Time to reach T = 500 K For Aluminum: p = 2750 kg/m, k = 200 W/m.K, and C, 1020 J/kg.K. Note: for a sphere V/A=D/6

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