Air movement is examined in the wind tunnel test. The air enters the narrowed throat from a cross-sectional area of 0,5 m² and exits from a cross-sectional area of 0,1 m². The exit velocity of the air from the narrowed neck was measured as 25 m/s and the pressure as 150 Pa. The atmospheric pressure and the temperature measured in the facility where the wind tunnel located as 1.01 bar and 20 °C, respectively. Calculate the velocity and pressure of the air entering the narrowed throat by assuming the density of the air as constant. (R=287 J/kg.K)

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Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.