Question: Steam enters a long, horizontal pipe with an inlet diameter of D1 12 cm at 1 MPa and 300C with a velocity of 2 m/s.

Steam enters a long, horizontal pipe with an inlet diameter of D1 12 cm at 1 MPa and 300°C with a velocity of 2 m/s. Farther downstream, the conditions are 800 kPa and 250°C, and the diameter is D2 = 10 cm. Determine
(a) The mass flow rate of the steam and
(b) The rate of heat transfer.

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