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A rotor has a mass of 12 kg and mounted midway on a 24 mm diameter horizontal shaft supported at the ends by two bearings. The bearings are 1 m apart. The shaft rotates at 2400 rpm. If the centre of mass of the rotor is 0.11 mm away from the geometric centre of the rotor due to certain manufacturing defect, find the amplitude of the steady-state vibration and the dynamic force transmitted to the bearing.
A 24.8-kg aluminium block initially at 209ºC is brought into contact with a 17-kg block of iron at 101ºC in an insulated enclosure. Determine the final equilibrium temperature and the total entropy change for this process.
A mild structural steel beam has a solid square cross section of 100mm and is simply supported by 2 supports 3m apart. A. Calculate the dead load that can be safely supported when applied to the middle of the beam?
a piston-cylinder assembly initially contains 0.5 m3 of air at 102 kpa and 90oc. the air is now compressed to 0.2m3 in
a 4-m x 5-m x 6-m room is to be heated by a baseboard resistance heater. it is desired that the resistance heater be
two barges each with a displacement mass of 550 mg are loosely moored in calm water. a stunt driver starts his 1650-kg
a 400 gallon cylindrical tank is filled with water. a valve is opened at the bottom of the tank. a five- gallon jug
air at 80 degrees fahrenheit and 80 percent relative humidity is cooled to 51 degrees fahrenheit at a constant pressure
A cylindrical electric resistance heater has a diameter of 1cm and length of 0.25m. When water at 30oC flows across the heater a heat-transfer coefficient of 15W/(m2oC) exists at the surface. If the electrical input to the heater is 5W, what is the s..
a spring-mass system has a frequency of 2 hz. when the mass is decreased by 0.4 kg the frequency is changed by 25.
A 1:10 scale model study of an automobile is proposed. A prototype speed of 100km/h is desired. What wind-tunnel speed should be selected for the model study? Comment on the advisability of such a speed selection.
determine the smallest horizontal force required to lift the 260- crate. the coefficient of static friction at all
Derive an expression for the bounding energy Eo in terms of the equilibrium interionic separation ro and the constants D, and p using the following procedure- Differentiate EN with the respect to r and set the resulting expression equal to zero.
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