1. Air enters a pipe at a Mach number of 0.1. The pipe is 1000 m long, having an inside diameter of.

1. Air enters a pipe at a Mach number of 0.1. The pipe is
1000 m long, having an inside diameter of 0.25 m. The flow is isothermal and
the friction factor remains constant over the entire length of the pipe at
0.013. Find the Mach number at the exit of the pipe.

2. A tank contains air at stagnation properties of 200 kPa
and 30 C. A vent of 3 cm diameter is opened. a) Find air flow rate if Pb = 150
kPa and b) if Pb = 101.35 kPa.

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