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What is the pressure at the bottom of a 300 ft tall dam (psi)? And What is the flowrate of a river that must flow through the dam to produce 20(10)^6 watts of power (20 megawatts)?
a carnot heat engine receives 1200 kj of heat per cycle from a high-temperature source at 925degc and rejects heat to a
For a vehicle in gravitationless space, determine the mass ratio necessary to boost the vehicle velocity by 1600 m/sec; the effective exhaust velocity is 2000 m/sec and the initial total vehicle mass is 4000 kg.
A gasoline engine is modeled as an Otto cycle. It has at temperature and pressure at the beginning of compression of 10°C and 90 kPa. The compression ratio is 7 and the specific energy added to the air during the heat addition process is 1432.46 ..
a site near an ocean is being evaluated for power generation using wind turbine. the site is observed to have steady
in a certain process the working fluid is cooled until 200 btulbm has been extracted. during this process 200 btulbm is
the fracture strength of glass may be increased by etching away a thin surface e layer. it is believed that the etching
a gas turbine has a pressure ratio of 15. it is connected to an electric generator with an efficiency of 95. the
two kilograms of water execute a carnot power cycle. during the isothermal expansion the water is heated until it is a
saturated steam condenses completely to liquid water at a rate of m1 2 kgs at 40 bar pressure saturation temperature
a microscope has a 2.40-cm focal length eyepiece and a 0.810-cm objective lens. for a relaxed normal eye assume a
a 1.5 hp motor is operarating in a room with air t of 20 c. the motor has an efficency of 78. the motor gives off heat
Design Engineering: Find Specific Load and Heat Generated Per Minute, A load of 6400 Kg is carried by a journal rotating in a 270 mm bearing diameter and 400 mm long. Find the specific load on the bearing and the heat generated per minute in the b..
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