PE8.2. Here you are on top of Mt. McKinley, at 20,300ft. You would like to know the atmospheric pressure, since you seem to have trouble breathing, but your manometer has fallen down an ice cave. Fortunately, your thermometer wasn't lost, and you use it to measure the boiling point of water as you boil a cup to make some tea. You find 75C. (a) What is the atmospheric pressure? (b) Use this pressure to estimate the altitude, and compare to the real altitude above. It will help to remember the "barometric formula," which says that the pressure of a gas decreases exponentially with altitude (A) as: P=P0exp(CA), where the constant C=Mg/(RT), where M is the average molar mass of the gas (30g/mol for the case here of normal air) and g is the acceleration of gravity (9.8m/s2). Assume room temperature air throughout all elevations, to simplify