Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hp-pcd!hpcvra.cv.hp.com!rnews!hpcvbbs!akcs.joehorn From: akcs.joehorn@hpcvbbs.UUCP (Joseph K. Horn) Newsgroups: comp.sys.handhelds Subject: Re: Wind Chill Index Message-ID: <279fe91b:1544.6comp.sys.handhelds;1@hpcvbbs.UUCP> Date: 25 Jan 91 08:40:14 GMT References: <15458@ogicse.ogi.edu> <279db350:1544.5comp.sys.handhelds;1@hpcvbbs Lines: 17 Omigosh, you won't believe this. In the Teacher's Edition of Addison Wesley's "Algebra and Trigonometry" high school textbook (1988), page 305, it gives the same formula for "windchill temperature" as we've seen above, but it leaves the units in the SI base: degrees Celsius, and windspeed in m/s. But they stupidly thought that m/s means miles per second! Here's what it says: "... where T is the actual temperature given in degrees Celsius and v is the wind speed in mi/sec." Wow, that's fast wind! Problem 50 then asks the student to calculate the windchill temperature given T=7 and v=8. Let's see; 8 mi/sec = 28,800 mph, according to the HP 48. Some wind! Hey - at that speed, wouldn't the temperature RISE due to air friction? No wonder our kids are graduating from high school totally innumerate...