CIS 2279 Homework Assignment #06

Due Friday, Sep 30, 2011

• Create a perl script named lab06.pl in your user directory. The script that has the following features: (5 pts. each)
  
  1. Asks the user to input the temperature (in degrees F), and wind speed (mph).
  2. Create a subroutine that takes the temperature and wind speed as arguments and returns the wind chill.
  3. Create a subroutine that takes a temperature in F and returns the value in C.
  4. Create a subroutine that takes a temperature in F and returns a temperature value in degrees Kelvin
  5. Using these subroutines, calculate the wind chill and print the values to the screen in degrees F, C and K
  Wind Chill (F) = 35.74 + 0.6215(T) - 35.75(V^0.16) + 0.4275(T)(V^0.16)
  Where T = temperature in degrees F and V = wind velocity in MPH.
  Celcius = (TempF - 32)/1.8

• 10% bonus - create a subroutine in the script above that will return the dew point (in degrees F,C and K) using the given temperature and RH%. You will need to prompt the user to input the RH value. Print the dew point to the screen in F, K and C using some descriptive text.

$dewpt = ((1/$temp_k) - (1/5412 * log($rh/100) ))**-1;

Where $temp_k is the temperature in Kelvin degrees and $rh is the relative humidity as an integer (ex. 88.4). You will need to convert the input temperature to Kelvin (temp C + 273.15). The output of the above equation will be in Kelvin degrees so you will need to convert back to F. Creating an additional subroutine for the conversions might not be a bad idea.

last updated: 05 Oct 2011 14:26