Physics Question－wszspj2的部落格

標題:

Physics Question

發問:

With the assumption that the air temperature is a uniform 0.0 degree Celsius , what is the density of the air at an altitude of 4.50 km as a percentage of the density at the surface? p/p0 = ? %

最佳解答:

Suppose the mass density p is proportional to the number density n As P=nkT (By assumption that T is constant) And P= (e^-K) Po, K is a constant P is the Pressure at an altitude. Po is the Pressure at the surface. You can find out n/n_0 That is p/p_0 I remembered that pressure decrease exponentially with height-_- 以後再補充