we looked at a constant-temperature atmosphe e atmosphere drops off with altitudez (height al ere I is the so-called lapse rate and is a const erties varying only in z. The pressure at sea leve basic hydrostatic model we derived in class (d 1 above, derive a differential equation for p(z). dp dz

Elements Of Electromagnetics
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2. Pressure in the atmosphere: The atmosphere has a density p that is related to the pressure
p by p = pRT (ideal gas law), where R is the specific gas constant of air and T is the local
temperature. In class we looked at a constant-temperature atmosphere. More realistically,
the temperature in the atmosphere drops off with altitude z (height above sea level) roughly
as T = To Iz, where I is the so-called lapse rate and is a constant. Assume a static
atmosphere with properties varying only in z. The pressure at sea level is a known value po.
(a) Starting from the basic hydrostatic model we derived in class (d = -pg) and using the
information given above, derive a differential equation for p(z). Also write down the
boundary condition.
(b) Solve the differential equation to obtain p(z).
Transcribed Image Text:2. Pressure in the atmosphere: The atmosphere has a density p that is related to the pressure p by p = pRT (ideal gas law), where R is the specific gas constant of air and T is the local temperature. In class we looked at a constant-temperature atmosphere. More realistically, the temperature in the atmosphere drops off with altitude z (height above sea level) roughly as T = To Iz, where I is the so-called lapse rate and is a constant. Assume a static atmosphere with properties varying only in z. The pressure at sea level is a known value po. (a) Starting from the basic hydrostatic model we derived in class (d = -pg) and using the information given above, derive a differential equation for p(z). Also write down the boundary condition. (b) Solve the differential equation to obtain p(z).
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