At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is -56.5°C and the air density is 0.364 kg/m³. What is the pressure of the atmosphere at that altitude?
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- Dr. B uses his phone and the app phyphox to measure atmospheric pressure at different heights. At the first floor of the UMass W.E.B. DuBois Library he measures a pressure of 101300 Pa. He then takes the elevator to the roof of the library and measures a pressure of 100172 Pa. If the density of the air is 1.205kg/m33, what is the height of the library? a. 124 m b. 96 m c. 76 m d. 67 m e. 105 mJason wants to use a Pilates ball as a desk chair. The Pilates ball has a diameter of 65cm, and is filled to a recommended air pressure of 0.9 PSI. What is the average force of the air inisde the Pilates ball pushing out? If the ball is filled with carbon dioxide (CO2) at 22 degrees C, how many molecules of CO2 are in the ball? (Area of a sphere = 4pir^2, Volume of a sphere = 4/3pir^3)An airplane passenger has 100 cm3 of air in his stomach just before the plane takes off from a sea-level airport. What volume will the air have at cruising altitude if cabin pressure drops to 7.50 X 104 N/m2?
- A high-altitude balloon is partially filled with 3 m3 of helium at sea level. As the balloon ascends through the atmosphere, the pressure drops and the gas expands. When it reaches its maximum volume of 7 m3, what is the pressure? (Assume the temperature does not change.)The wing of an airplane has an average cross-sectional area of 13 m3 and experiences a lift force of 89,000 N. What is the average difference in the air pressure between the top and bottom of the wing ?Tire gauges for air pressure, as well as most other gauges used in an industrial environment take into account the pressure due to the atmosphere of earth. That's why your car gauge reads 0 before you put it on your tire to check your pressure. That is called gauge pressure. The real pressure within a tire or other object contains pressurized stuff would be a combination of what the gauge reads as well at the atmospheric pressure. If a gauge on a tire reads 40.16 psi, what is the real pressure in the tire in pascals. The atmospheric pressure is 1.01x10^5 Pa.