Question

Consider an airplane flying at some real altitude. The outside pressure and temperature are 2.65 x 104N/m2and 215 K respectively. What are the pressure and density altitude?

Answer 1

Answer:

The pressure altitude is $A = 10\ km$

The density altitude is $\rho = 0.429 kg/m^3$

Explanation:

From the question we are told that

The outside pressure is $P_o = 2.65*10^{4} N/m^2$

The outside temperature is $T_o = 215 \ K$

Generally the density altitude is mathematically represented as

$\rho = \frac{P_o }{RT}$

Here R is the gas constant with value $R = 287\ J/kg/K$

So

$\rho = \frac{2.65 (*10^{4}}{287 * 215}$

=> $\rho = 0.429 kg/m^3$

Generally the altitude at which the pressure in the question is experience is

$A = 10\ km$

Thus the pressure altitude is  $A = 10\ km$