In the processing of latex sheets from latex, latex sheets having properties as follow: wideness: 1 m , thickness :0.002 m, density, = 1300 kg/ m3 , specific heat, cp = 1800 J/ kg.K, and emissivity, = 0.7 to be produced. After the latex were heated, produced latex sheets at the rate of 0.17 m/s undergoing cooling process by forced convection as shown in Figure 1. Only 0.5 meters long latex sheets were exposed to ambient airflow (27C) at both the top and bottom at a velocity of 3.5 m/s during the forced convection occurs. If the initial temperature of latex sheet is 126.7C, determine:

a) The rate of heat transfer from latex to air through forced convection and radiation.

b) The temperature of the latex sheet after the cooling process.

0.5 m 7 126.7C Latex sheet 7/11 Air (27C, 3.5 m/s) 1 1 m E 0.002 m 0.17 m/s