during a plant visit, it was noticed that a 12-m-long section of a 10-cm-diameter steam pipe is completely exposed to the ambient air. the temperature measurements indicate that the average temperature of the outer surface of the steam pipe is 75c when the ambient temperature is 5c. there are also light winds in the area at 10km/h. the emissivity of the outer surface of the pipe is 0.8, and the average temperature of the surfaces surrounding the pipe, inclding the sky, is estimatced to be 0c. determine the amount of heat lost from the steam during a 10-h-long work day.