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A machine of mass 200 kg is driven harmonically by a 100-N force at 10 rad/s.
The stiffness of the machine is 20,000 N/m.
Design a broadband vibration absorber [i.e., equation (5.37)] to limit the machine's motion as much as possible over the frequency range 8 to 12 rad/s.
Note that other physical constraints limit the added absorber mass to be, at most, 50 kg.
the central cubical area of an office building at sea level has a floor area of 4000 ft2 and is occupied by 30 people
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The answer is no, and the reason is that mutual inductances must exist between stator phases as given by (7.9-6). To show this, take a two-pole,
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the homogenous composite object shown is 3 inches thick and is hinged at o. l 48 inches w 6 inches and r 12 inches
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The COP of vapor-compression refrigeration cycles improves when the refrigerant is sub cooled before it enters the throttling valve. Can the refrigerant be sub cooled indefinitely to maximize this effect, or is there a lower limit?
an electric generator provides 500 kw and is powered by a diesel engine with a compression ratio of 19 and a cutoff
Air with a mass flow rate of 1.5 kg/sec and temperature of 400 K flows through a horizontal duct of an air heater. If 36 kJ/sec of heat is added to the flow, determine the air exit temperature. Assume ideal gas and neglect any change in pressure and ..
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