Use Figure 7.4 to find the pressure at an altitude of 20 km.FIGURE 7.4 Atmospheric Pressur...

Use Figure 7.4 to find the pressure at an altitude of 20 km.

FIGURE 7.4 Atmospheric Pressure Drops with Increasing Altitude Above Sea Level The atmospheric pressure at Mauna Kea Observatory (altitude 4 km) is about 60% that at sea level while the pressure at the summit of Mt. Everest (altitude 9 km) is only about 30% that of sea level.