Air at 15 ? C ?ows over a ?at plate. A heater strip 10 cm long is placed on the plate at a distance 15 cm from the leading edge. The local heat transfer coe?cient at the end of the heater strip (i.e. 25 cm from the leading edge of the plate) calculated with Equation 5-41, on page 235 is 20W/m 2? C. Calculate the heat lost from the strip per unit depth of the plate for a heater surface temperature of 60 ? C.