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An axial-flow hydraulic turbine operates with a head of 20 m at turbine entry and develops 10 MW when running at 250 rpm. The blade tip diameter is 3 m, the hub diameter is 1.25 m, and the runner design is based upon a "free vortex." Assuming the hydraulic efficiency is 94%, the overall efficiency is 92%, and the flow at exit is entirely axial, determine the absolute and relative flow angles upstream of the runner at the hub, mean, and tip radii.
a person pushes a car from rest adn accelerates to 4kmh in 5 seconds. the veolicty stays constant for 1km the first 500
consider a rankine cycle 100 mw net power vapor power plant with a reheater and regeneration and a single open
As shown, a member is fixed at the origin, point O, and has an applied force F, the tension in the rope, applied at the free end, point B. The force has magnitude F = 150 N and is directed as shown. The dimensions are x1 = 0.450 m, x2 = 1.90 m, y1 = ..
Two simple pendulums are related as follows. Pendulum A has a length LA and a bob of mass mA; pendulum B has a length LB and a bob of mass If the period of A is twice that of B, What is the relationship between LA and LB?
air at 5 bar and 177oc state 1 is expanded through a turbine to 1 bar and 27oc state2. the mass flow rate of air
A cutting tool (0.250in wide, rake angle 5 degrees) is used to machine in orthogonal mode. the depth of cut is 0.010in and the chip thickness is 0.027in. Calculate the shear angle and coefficient of friction at the tool and chip interface?
how does the statistical mechanical definition of entropy allow a reinterpretation of the second and third law of
Calculate the crack length after cycles and subjected to a cyclic stress normal to the crack
a. What is the melting point at standard conditions for ammonia? Boling point is given -33.4C. b. What is the enthalpy change for boiling ammonia at 0C?
the masses of blocks a b c and d are 9 kg 9 kg 6 kg and 7 kg respectively. knowing that a downward force of magnitude
The two particles collide with each other as shown. Find the velocities of A and B after impact.
a .75 m3 rigid tank initially contains water at 250degc 50 liquid and 50 vapor by volume. a valve at the
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