Calculate the pressure, density and temperature at 30,500 ft in the Standard Atmosphere.

If gas expands to fill all the space available to it, explain why the Earth's atmosphere doesn't drift off into space.

At a certain altitude, a standard altimeter reads 3,000 meters. If the density altitude is 2,500 meters, find the true temperature in Kelvin.

Barometric Pressure Halley's law states that the barometric pressure (in inches of mercury) at an altitude of x mi above sea level is approximated by the equation below. p(x) = 29.92e-0.2x (x 2 0) If the barometric pressure as measured by a hot-air balloonist is 20.5 in. of mercury, what is the balloonist's altitude? (Round your answer to two decimal places.)