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A steam engine functions by converting liquid water to steam, which is then used to drive a rotating shaft. This engine contains 2 engineering devices: the boiler where the liquid water is converted to steam and the turbine where the steam is used to drive the shaft. Let the fuel used in the boiler be wood with a heating value of 15 MJ/kg (i.e. when 1 kg of wood is burned 15MJ of energy is released). When .1 kg of fuel was burned the shaft output was measured to be 567 kJ. Assuming the turbine is 90% efficient, what is the efficiency of the boiler?
the structural engineering design section within the engineering department of a regional natural gas corporation has
a 2-cm long section of a 3-mm in diameter wire is maintained at a constant surface temperature of 370c. the wire is
a four cylinder four stroke gasoline internal combustion engine has a bore of 9.4 cm and a stroke of 8.6 cm. the
you purchase a building lot for 20000 and build q 110000 duplex apartment on it. you paid cash for the lot the bank
The cold cranking amperes (CCA) of a conventional lead-acid automobile battery is the amount of current the battery can provide at 0°F for 30 seconds and minute in at least 1.2 volts per cell (or 7.2 volts for a standard 12-volt battery). If a batter..
405-N rightward force is use to drag a large box across the floor with a constant velocity of 0.678 ms-1. The coefficient of friction between the box and the floor is 0.795. Determine the mass of the box.
you are designing a converging-diverging nozzle to operate at sea level. the nozzle will be mounted on a glider that
the refrigerator steadily receives a power input of 0.15 kw while rejecting energy by heat transfer to the surroundings
a six cylinder 2-stroke diesel engine running at 120 revmin has a bore of 900mm and a stroke of 1300mm. the brake
consider a system operating a power cycle between thermal reservoirs at temperatures th and tc where thgttc. using 1st
a 6-km cast-iron new pipeline conveys 320 lsec of water at 30 degrees celsius. if the pipe diameter is 30 cm compare
hot air is contained in a vertical frictionless piston-cylinder device.the piston has a mass of 4 kg and a
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