At one section in a constantarea duct the stagnation pressur

At one section in a constant-area duct the stagnation pressure is 66.8 psia and the Mach

number is 0.80. At another section the pressure is 60 psia and the temperature is 120°F.

(a) Compute the temperature at the first section and the Mach number at the second section if the fluid is air.

(b) Which way is the air flowing?

From the above following data

Temprature is given by = 237 c

mach number is given by = 2

Air is following in east direction

friction length = 50 m