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The hoover dam has a capacity to produce 2,080 MW of electrical power. The difference in height between the surface of Lake Mead (the upper reservoir) and the Colorado River at the exit is about 180 m. The dam is designed to allow 2067 m^3/s of water to pass through the turbines. If the efficiency of the turbine-generator system is 70 %, determine the irreversible power loss within the dam and the head loss. Assume the changes in kinetic energy to be negligible and the water to have a constant density of 1000 kg/m^3.
a stone is thrown vertically upward from a point on a bridge located 40m above the water. knowing that it strikes the
the maximum allowable value of each of the reactions is 180 N neglecting of the weight of beam, determine the range of te distance d for which the beam is safe.
a very wide sheet of 7075-t651 aluminum plate 8mm thick is found to have a single-edge through-the-thickness crack 25
A 10 kW electric heater is used to heat 2 kg of air contained in an insulated rigid tank from 400 kPa and 50 °C to 200 °C. The ambient air temperature and pressure is 20 °C and 100 kPa, respectively.
question 1the naca 4412 airfoil has a mean camber line given byby using thin airfoil theory calculatea. its zero-lift
the 500 lbf motor is supported on springs with a total stiffness of 5000 lbfin. the springs have a damping ratio of
Your engineering firm decides to build a prototype, and needs screw and nut fasteners as well as resistors and LEDs. There are machinists and electronics technicians available for in-house production. What is the most cost-effective way of acquiri..
a heat pump utilizes a well-insulated compressor to compress r-134 from a saturated vapor at 160 kpa at a rate of 0.85
find the total heat loss per m length of the steam line. Find also the temperature at the interface of steam and insulation.
a gymnast of weight 720n is holding himself in the cross position on the high rings. he is quite still. draw a
permit a user to input a number between 1 to 10. store this value as the variable numberofresistors. this will be used
conventional ceramics have a fracture toughness of about 5 while advanced ceramics may have 20. determine1 how larger
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