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//Variable declaration:
a = 1 //Length of cross-section (m)
b = 0.25 //Width of cross-section (m)
v = 1*10**-5 //Kinematic viscosity of air (m^2/s)
Re = 2300.0 //Reynolds Number
cm = 100 //Cenitmeters in a meter
//Calculation:
Dh = 2*a*b/(a+b) //Hydraulic diameter of duct (m)
V = Re*v/Dh*cm //Maximum air velocity (cm/s)
//Result:
printf("The maximum air velocity before the flow becomes turbulent is : %.1f cm/s.",V)
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