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Required information

Problem $01\mathrm{.}127-$ DEPENDENT MULTI$-$PART PROBLEM $-$ ASSIGN ALL PARTS

It is well known that wind makes cold air feel much colder as a result of the wind chill effect that is due to the increase in the convection heat transfer coefficient with increasing air velocity. The wind chill effect is usually expressed in terms of the wind chill temperature $($WCT$),$ which is the apparent temperature felt by exposed skin. For an outdoor air temperature of $0C,$ for example, the wind chill temperature is $-5C$ at $20k\frac{m}{h}$ winds and $-9C$ at $60k\frac{m}{h}$ winds. That is$,$ a person exposed to $0C$ windy air at $20k\frac{m}{h}$ will feel as cold as a person exposed to $-5$Ccalm air, which is air motion under $5k\frac{m}{h}.$ For heat transfer purposes, a standing person can be modeled as a $47-$ cm $-$diameter, $170-cm-$long vertical cylinder with both the top and bottom surfaces insulated and with the side surface at an average temperature of $34C.$

Problem $01\mathrm{.}127.$c Wind Chill

If the rate of heat loss from this person by convection in still air at $20C$ is $527\mathrm{.}34$ W $,$ and the rate of heat loss from this person by convection in windy air at $20C$ is $1054\mathrm{.}68$ W $,$ determine the wind chill temperature. $$

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