(Solved): Cp for coolant =1 The radiator in an automobile is a cross flow heat exchanger (UAs \( =10 \mathrm{K ...

The radiator in an automobile is a cross flow heat exchanger (UAs \( =10 \mathrm{KW} / \mathrm{K} \) ) that uses air \( (C p=4.00 \mathrm{~kJ} / \mathrm{kg}-\mathrm{K}) \). The engine fan draws \( 30 \mathrm{C} \) air through this radiator at a rate of \( 10 \mathrm{~kg} / \mathrm{s} \) while the coolant pump circulates the engine coolant at a rate of \( 5 \mathrm{~kg} / \mathrm{s} \). The coolant inters this radiator at \( 80 \mathrm{C} \). Under these conditions, the effectiveness of the radiator is \( 0.4 \). Determine (a) the outlet temperature of the air and (b) the rate of heat transfer between the two fluids.