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H2O as saturated liquid/vapor mixture enters a counterflow heat exchanger operating at steady state at 0.7 bar with a specific enthalpy of 2431.6 kJ/kg and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.5 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30 degree C and exits at 60 degree C. The ideal gas model, with a constant cp = 1.005 kJ/kg*K can be assumed for the air. Kinetic and potential energy effects are negligible. Determine a) the quality (x) of the entering H 2O and b) the rate of heat transfer (Q) between the heat exchanger and its surroundings, in kW.
it is observed that the time for the ball to strike the ground at b is 2.5 s. determine the speed va and angle ua at
describe in an itemized list or flowchart the steps to solution to determine the probability of yielding if both the
the constant tensions of 200 n and 160 n are applied to the hoisting cable as shown. if the velocity v of the load is
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a tank has a volume of 0.5 m3 and contains nitrogen and water vapor. the temperature of the mixture is 50c and the
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p rtvct21 use maxwell relations to prove that the entropy of the system using this substance between states p1 and p2
Wheel of radius r is driven by an arm OA. It is driving (without slip) wheel of a radius r2 which is fixed to a drum of radius r1. Load G is attached to the rope which winds on the drum. Calculate the speed of load G if the arm OA moves at n rev/m..
determine the designe power. An output speed of 175 RPMis specified. Determine: a) number of teeth on the small sprocket, b) number of teeth on the large sprocket, c) lubrication type required, d) the required length of chain (in inches) if the ce..
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