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The available head from reservoir level to the four nozzles of a twin-runner Pelton wheel is 305 m. The length of the supply pipe, or penstock, is 3 km with a friction factor f = 0.02 and ΣK = 2.0. The turbine develops 10.4 MW with an efficiency of 0.85. P
(a) If the head across the turbine is 95% of the available head, what is the diameter of the penstock?
(b) If Cv = 0.98 for each nozzle, calculate the diameter of each jet
what do you understand by closed packed planes and closed packed direction in the arrangement of atoms? justify their
a.calculate the enthalpy entropy and gibbs free energy changes when 10g of supercooled liquid silver solidifies
tin cans are made of a steel the inside of which is cated with a thin layer of tin. the tin protects the steel from
in kidney dialysis a persons blood is passed through a bath that contains several ions and molecules. the blood is
develop the maxwell and kelvin-voigt relations. creep is deformation under constant stress while stress relaxation is
1.determine the specific volume of superheated nitrogen gas at an absolute pressure of 678 kpa and -134degc based on a
Model a cup of coffee as a closed system containing 1 lbm of pure water at constant pressure of 14.7 psia. Using your knowledge of the 2nd Law, prove that it would be impossible for coffee at room temperature of 70 °F to heat up to 120 °F by receivin..
find the work done in moving an object in this field
a high rise office building located in a city at sea level is exposed to a wind of 75 kmh. what is the static pressure
Evaluate the coef?cient of thermal expansion, α, for rubber under an extension of 100% at 20?C. A rubber band was stretched from 6 to 12 ins. While being held under a constant stress, it was heated from 20?C to 40?C.
in a heat exchanger 10 kgs of water enters the hot side at 73degc and leaves at 43degc. 19 kgs of water enters the cold
air is compressed steadily by a reversible compressor from an inlet state of 100kpa and 300k to an exit pressure of 900
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