Carbon dioxide flows through an insulated pipe 25 m longand 8 cm in diameter. The friction factor is 0.025. At theentrance, p = 300 kPa and T = 400 K. The mass flow is1.5 kg/s. Estimate the pressure drop by (a) compressibleand (b) incompressible = flow theory. (c) For whatpipe length will the exit flow be choked?

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