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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?
Determine the factor of safety against net section yield in the presence of the crack and determine the factor of safety against brittle fracture for the same conditions.
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a circular sign has a diameter of 50cm and is subjected to normal winds up to 150kmh at 10 degrees celsius and 100kpa.
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