Th e fi ns on an air-cooled motorcycle engine are in essence fl at plates 4 cm wide and 14 cm long. For a motorcycle speed of 60 km/hr, determine the heat-transfer rate to the air from one fi n. Th e...

Th e fi ns on an air-cooled motorcycle engine are in essence fl at plates 4 cm wide and 14 cm long. For a motorcycle speed of 60 km/hr, determine the heat-transfer rate to the air from one fi n. Th e air temperature is 5°C, and the surface temperature of the fi ns is constant at 130°C.