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An electric motor and its base have a combined mass of M = 12 kg Each of the four springs attached to the base has a stiffness k = 480 kN/m and a viscous damping coefficient c. The unbalance of the motor is equivalent to a mass m = 0.005 kg located at the distance e = 90 mm from the center of the shaft. When the motor is running at ω = 400 rad/s, its steady-state amplitude is 1.8 mm. Determine
(a) the damping coefficient of each spring; and
(b) the phase angle between the displacement of the motor and ωt
It is desired to design a wind turbine that will output 2MW of peak electrical power at a location where the average wind speed is 10 m/s and the average ambient conditions are 85 kPa and 5 ?C. What should the rotor blade length be if the aerodynamic..
What was the percentage error found between experimental and accepted values and what caused any errors, and how could they be minimised?
What will be the equilibrium carrier concentration of majority and minority charge carriers if some doped Si with 1012 Boron/cm3? What will be the carrier concentration of minority and majority charge carriers if silicon is doped with 1016 /cm3 ? ..
Give the advantages and disadvantages of each type of automated system.
Assume each luminaire consumes 435 W including the ballast. Determine the power density of this lighting installation.
1. A piston-cylinder assembly contains 0.1 lb of propane. The propane expands from an initial state where p1 5 60 lbf/in.2 and T1 5 30°F to a final state where p2 5 10 lbf/in.2 During the process, the pressure and specific volume are related by py2 5..
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what are the higher and the lower heating values of a fuel? how do they differ? how is the heating value of a fuel
A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa. An electric resistance heater inside the cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
Describe several Safety signs (You have to mention the References), Design safety signs and describe where they could be applied in the selected hazard.
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