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//Example 11-1 Measuring the Drag Coefficient of a Car
P = 1 //pressure of air [atm]
T = 20 //temperature of air [C]
V = 95 //relative velocity of car with respect to air [km/h]
A = 2.07 //frontal area of car [m^2]
F_D = 300 //force acting of the car in the flow direction [N]
R = 287 //gas constant for air [J/kg.K]
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