T=100°C Question 2: Aluminum sphere of mass 5.5kg and initially at a temperature of 290°C is suddenly immersed in a Fluid at 15°C. The convective heat transfer co-efficient is 58 W/m²K. Estimate the time required for the sphere to reach 95°C, using lumped heat capacity method of analysis. Take properties of aluminum p = 2700kg/m³, cp=900 J/kg K; K = 2015 W/mK. Question 3