Answer:
15 atm
Step-by-step explanation:
Solution
Given that:
The first step is to convert mass flow rate unit
m = 87.6 lbm/s = 2.72 slug/sec
Now,
We express the mass flow rate, which is
m = p₀ A* /√T₀√y/R ( 2/ y+1)^(y+1) (y-1)
so,
2.72 = p₀ ^(0.5)/√6000√1.21/2400 (2/2.21)^10.52
Thus,
p₀ = 31736 lb/ft^2
Then,
We convert the pressure in terms of atmosphere
p₀ = 31736/ 2116 = 15 atm