At what temperature, in degrees Celsius, does still air cause the same effective temperature as -5°C air moving at 15 m/s?

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The phenomena of "wind chill" is a complicated combination of heat transfer through convection and conduction. The following table estimates the effective temperatures due to wind chill for a variety of air temperatures and wind speeds.

a. At what temperature, in degrees Celsius, does still air cause the same effective temperature as -5°C air moving at 15 m/s? 

Moving air temperature
(°C)
5
2
0
-5
-10
-20
-40
Wind speed (m/s)
2 5
10
3
-1
-8 -10-12
0
-7
-12-16-18
-2 -9 -15-18-20
-7 -15-22-26-29
15
20
-12-21-29 -34-36
-23-34-44-50-52
-44-59-73-82-84
Transcribed Image Text:Moving air temperature (°C) 5 2 0 -5 -10 -20 -40 Wind speed (m/s) 2 5 10 3 -1 -8 -10-12 0 -7 -12-16-18 -2 -9 -15-18-20 -7 -15-22-26-29 15 20 -12-21-29 -34-36 -23-34-44-50-52 -44-59-73-82-84
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