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Water behind a dam enters an intake pipe at a pressure of 1.05 bar and velocity of 1 m/s, flow through a hydraulic turbine-generator, and exits at a point 100 m below the intake at 1 bar, 15 degrees C, 10 m/s. the diameter of the exit pipe is 1.2 m and the local acceleration of gravity is 9.8 m/s^2. Evaluating the electricity generated at 8 cents per kWh, determine the value of the power produced, in $/day, for operation at steady state and in the absence of internal irreversibilities.
in usa 53 of total electric power is currently generated by coal-fired power plants. typically generation of 1 kwh of
determine the instantaneous rate of heat transfer from a 1.5-cm-diameter ball bearing with a surface temperature of 150
a fuel oil is analyzed and found to contain 85.0 wt carbon 12.0 elemental hydrogen h 1.7 sulfur and the remainder
1. what are rupture disks under the relief valves? what if there is a pin hole leak under a rupture disk?2. what are
a cylindrical duct supplies 1.20 kgs of combustion air at 150 c and 95.0 kpa to a furnace. if the velocity of the air
a closed tank having a volume of 2ft3 is filled with 0.30 lb of a gas. a pressure gage attached to the tank reads 12
the tie rod ab and a pipe strut ac are used to support a 100-kn load as shown in the figure. both members are made of
an automobile traveling at 90 kmhr rounds a long sweeping curve of radius 250m. the air conditioner is on and the
Estimate the minimum bar diameter to prevent fatigue failure.
a 200 kg lander is approaching mars. assume a gravitational acceleration of 3.7 ms2. at the illustrated instant h 15 m
a scuba diver has a tank with an internal volume of 2500 cm3 air tank which is pressurized to 22 mpa at 27 deg c. after
a spinning dartboard is used in a carnival game. the board is .4 m by .27 cm and has a mass of 950 grams. the operator
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