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 (123.1 KiB) Viewed 40 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 rate of heat flow out of the sphere is 11.30 kW. The temperature at the inside and outside surfaces of the sphere is Tį and T2. The thermal conductivity of the material is k = 170 W(m.K)!. T; - T2 (a) Demonstrate that the rate of heat conduction is computed by the formula: P = 4tkrir2 12-1 (b) Find the difference of temperature between two surfaces of the sphere.