36 22 32 20 Capt. Kittinger, USAF 1961 31.3 km (102,800 ft) Air pressure = 0.6 mb Pressure exerted by the atmosphere 18 28 16 24 14 20 12 Air pressure at top of Mt. Everest (29,035 ft) is 314 mb 16 10 1013 mb 50% of atmosphere lies below this altitude 12 or 14.7 Ibs/n? 6 4 2 200 400 600 800 1000 Pressure (mb) Atmospheric pressure is simply the weight of the air above. Allitude (km) || | || 8. Alttude (miles)
Refer to the graph in Figure 1.18 to answer the following:
a. Approximately how much does the air pressure drop (in
millibars) between the surface and 4 kilometers (2.5
miles)? (Use a surface pressure of 1000 millibars.)
b. How much does the pressure drop between 4 and 8
kilometers (2.5 and 5 miles)?
c. Based on your answers to parts a and b, select the correct
answer: With an increase in altitude, air pressure
decreases at a(n) (constant, increasing, decreasing) rate. d. If you were to climb to the top of Mount Everest, how
many breaths of air would you have to take at that
altitude to equal one breath at sea level?
e. If you are flying in a commercial jet at an altitude of 12
kilometers (7.5 miles), about what percentage of the
atmosphere’s mass is below you?
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