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A machine of mass 400 kg operates at 1500 rpm and has an unbalanced which causes a harmonic repeated force pf magnitude 20,000 N. Design an isolation system to limit the transmitted force to 3,500 N and the amplitude of vibration during operation to 1mm, and the amplitude of vibration during start-up to 10mm. Specify the required stiffness of the isolator and the minimum mass that should be added to the machine. Assume a damping ratio of 0.05.
two possible routes for a power line are under study. data on the routes are as followsaround the lake under the
the average electrical generating capacity of the united states was about 475000 mw in 2007. if trends continue this
Steam @ 10 MPa, 600 degrees celcius enters the first-stage turbine of an ideal Rankine cycle with reheat. The steam leaving the reheat section of the steam generator is @ 500 degrees celcius
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Weekly sales for watermelons over the summer at a local produce stand exhibit a linear trend. The demand for weeks 1 through 10 was 91, 94, 95, 97, 92, 101, 107, 116, 113, and 121. Calculate the forecasts for weeks 2 through 10 using Holt’s double ex..
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a concentric tube heat exchanger uses water which is available at 15?c to cool ethylene glycol from 100 to 60c. the
A two capacity process tank is to be analyzed using proportional and integral controllers. A process could be a steam jacketed kettle as shown in Figure.1.Water is heated continuously by the steam flow and it is proposed to use a controller to regula..
a 40 cm diameter pipe at 75 degree c is buried in a large block of portland cement. it runs parallel with a 15 degree c
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