A pipeline used for the transport of hot water is buried in the earth such that its centerline is at 2 m below the surface. The pipehas an outer radiusof 300 mm and insulated with a layer of polystyrene, density 56 kg/m3, 100 mm thick. What is the heat lossper unit lengthwhen water at 75 ºC flows and the surface of the earth is at 0 ºC?

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.