Q5. (20 marks) A hollow sphere of inner radius rı = 30 cm and outer radius r2 = 50 cm is heated at the inner surface. Th

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Q5 20 Marks A Hollow Sphere Of Inner Radius Ri 30 Cm And Outer Radius R2 50 Cm Is Heated At The Inner Surface Th 1 (37.78 KiB) Viewed 67 times

Q5. (20 marks) A hollow sphere of inner radius rı = 30 cm and outer radius r2 = 50 cm is heated at the inner surface. The temperature at the inside and outside surfaces of the sphere is T and T2. 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 = 4rt kri72 12-11 (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.