Q5. (20 marks) A hollow sphere of inner radius n = 30 cm and outer radius r = 50 cm is heated at the inner surface. The

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Q5 20 Marks A Hollow Sphere Of Inner Radius N 30 Cm And Outer Radius R 50 Cm Is Heated At The Inner Surface The 1 (19.35 KiB) Viewed 62 times

Q5. (20 marks) A hollow sphere of inner radius n = 30 cm and outer radius r = 50 cm is heated at the inner surface. The temperature at the inside and outside surfaces of the sphere is T and Tz. The thermal conductivity of the material is k = 170 W.(m.K)'. T-T (a) Demonstrate that the rate of heat conduction is computed by the formula: P = 4mkring (b) The difference of temperature between two surfaces of the sphere is 7.0°C. Find the rate of heat flow out of the sphere