|Jun26-12, 09:48 PM||#1|
Wind Chill and Frostbite
Two questions. I have read that wind chill is a measurement (or calculation, more accurately) that describes how cold the wind feels, even though the wind isn't actually colder than still air. What I am wondering is why isn't the wind actually colder? If it is moving faster it is lower pressure than the surrounding air, and thus according to the ideal gas law also lower temperature, right?
Secondly I have read on a few different sources that you can get frostbite above freezing temperatures if there is a strong wind chill. How can that be? Doesn't frostbite only happen when the skin or blood vessels freeze? I did not think it was possible for heat to flow from lower temperature body to higher temperature body.
physics news on PhysOrg.com
>> Promising doped zirconia
>> New X-ray method shows how frog embryos could help thwart disease
>> Bringing life into focus
|Jun27-12, 01:39 AM||#2|
This NOAA site http://www.nws.noaa.gov/os/windchill...ry.shtml#frost is a bit confusing, but it does say clearly:Object will NOT cool below the actual air temperature.
|Similar Threads for: Wind Chill and Frostbite|
|wind scaling and increasing wind speed for wind tunnel problem||Mechanical Engineering||3|
|The wind chill factor?||Classical Physics||5|
|Compressed air at high pressure can cause frostbite?||General Physics||2|
|wind chill is heat transfer by?||Introductory Physics Homework||7|
|Reversed wind chill at night?||General Physics||13|