Mount Air
The height of Mount Everest is 8848 m above sea level. What is the air pressure at the point in kPa? How?
Compare this value with the pressure at sea level? Use 7500 m for the scale height of the atmosphere.
At H altitude in the atmosphere, the pressure air is: P = Patm - Rho xgx Patm where H is atmospheric pressure at sea level (1 atm or 1.013 bar or 101.3 kPa) rho = average density the atmosphere between sea level and H g = 9.81 m/s2 The only difficulty is to estimate Rho varies with altitude, as Rho depends on pressure P and T is the temperature at the altitude H using the formula derived from the law of Gay-Lussac PV = nRT. Rho = 0.0035 P / T, so if you want to determine the precise value of P at 8848 m, you must use iterations calculate Rho at sea level and P assume at 8848 m and knowing T 8848 m, calculate Rho 8848 m. And so on until P is assumed about P calculated.
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