We will show in Chapter 2 that air pressure at high elevations is determined by: Bz RB P=P = (1) о where z is elevation measured from the sea level (==0). T=15 "C=288.16 K = 518.69 R is the lbf air temperature at sea level and P=101350 Pa =14.696 psi (2) is the air pressure at sea level. in² B=0.003566=0.0065 K is the air temperature slope in both systems of units. ft m a) Show that Eq. (1) is dimensionally homogeneous. b) Calculate the value of the exponent & in both systems of units and show its units. Watch for gr. RB c) Calculate the air pressure at 10.000 m and 30,000 ft elevations in Pa and in psi, respectively. Check your results with the given data in Table A-5 (Appendix A).