Chapter 5, Problem 5PP

In cold weather, meteorologists report an index called the windchill factor, that takes into account the wind speed and the temperature. The index provides a measure of the chilling effect of wind at a given air temperature. Windchill may be approximated by the formula:

  W=13.12+0.6215* t–11.37 *v0.16+0.3965 * t *v0.016

  where

  v = wind speed in m/sec

  t = temperature in degrees Celsius: t <= 10

  W = windchill index (in degrees Celsius)

Write a function that returns the windchill index. Your code should ensure that the restriction on the temperature is not violated. Look up some weather reports in back issues of a newspaper in your university library and compare the windchill index you calculate with the result reported in the newspaper.