Physics, 16.02.2021 01:00 crystalstargala
The wind chill, which is experienced on a cold, windyday, is related to increased heat transfer from exposedhuman skin to the surrounding atmosphere. Consider alayer of fatty tissue that is 3 mm thick and whose inte-rior surface is maintained at a temperature of 36C. Ona calm day the convection heat transfer coefficient atthe outer surface is 25 W/m2K, but with 30 km/hwinds it reaches 65 W/m2K. In both cases the ambientair temperature is 15C.(a) What is the ratio of the heat loss per unit area fromthe skin for the calm day to that for the windy day
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