1. Place cursor in front of the number in the row for Geopotential Altitude       and in the feet box since our given value is in feet. Highlight the       number in that box.

	2. Type in the desired value (in this case 8000). Notice that the boxes       with meters and statute miles in the Geopotential Altitude row have       changed and have the converted value of 8000 feet in these units.

	3. You are done! Just read the desired result from the corresponding row.      In this case we wanted Pressure and Temperature. The Temperature is      272.3 K, -0.85 oC and, 30.47 oF. The Pressure is 75262.32 Pa, 22.22 InHg,      and 1571.89 lbf/ft2. Note that you can also see all the other properties as well!

     Important: There are times when a problem may have multiple solutions. For example there are two
     altitudes in which the temperature is -2.5 ^oC. At 8,836.7 ft and 168,676.1 ft, yet if you input - 2.5 ^oC
     on the Temperature row you will always get the solution that lies at the lowest altitude, that is,
     8,836.7 ft. This is always true for all other properties that have multiple solutions.

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     Note that it does not matter the order that you enter the rows. The remaining row (field) will
     be calculated based on the values of the other two rows when the Eval button of that row is pressed.

     * Time estimates are based on a person that already knows how to use the web site.