5. A short brass cylinder (=8530kg/m3,cp=0.389kJ/kgC,k=110W/mC, and =3.39x105m2/s ) of diameter 8cm and height 15cm is initially at a uniform temperature of Ti=150C. The cylinder is now placed in atmospheric air at 20C, where heat transfer takes place by convection with a heat transfer coefficient of 45 W/m2C. Calculate (a) the center temperature of the cylinder; (b) the center temperature of the top surface of the cylinder; and (c) the total heat transfer from the cylinder 20min after the start of the cooling. 5. A short brass cylinder (=8530kg/m3,cp=0.389kJ/kgC,k=110W/mC, and =3.39x105m2/s ) of diameter 8cm and height 15cm is initially at a uniform temperature of Ti=150C. The cylinder is now placed in atmospheric air at 20C, where heat transfer takes place by convection with a heat transfer coefficient of 45 W/m2C. Calculate (a) the center temperature of the cylinder; (b) the center temperature of the top surface of the cylinder; and (c) the total heat transfer from the cylinder 20min after the start of the cooling