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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.
an adiabatic compressor compresses nitrogen k1.4 r0.297 from p1200 kpa and t1300k to p21500kpa. the isentropic
air at 80oc and a pressure of approximately 1350 kpa abs flows in a 20-mm-diameter tube. what is the minimum turbulent
the rear window of an automobile is defogged by passing warm air over its inner surface. if the warm air is at 30 c and
the truck at b is used to hoist the cabinet up to the fourth floor of a building using the rope and pulley arrangement.
as part of a pollution study a model concentration c as a function of position x has been developedcx ae-x2a -
A single plate clutch with both sides of the plate effective is required to transmit 25 kW at 1600 r.p.m the outer diameter of the plate is limited to 300 mm and the intensity of pressure between the plate not to exceed 0.07 N/mm^2.
the pressure from water mains located at street level may be insufficient for delivering water to the upper floors of
all of the members of the 4-member frame shown have rectangular cross-sections 2 in. wide by frac12 in. thick. all pins
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a laboratory furnace wall is constructed of 0.20m thick fireclay brick having k11.2 wm-amp176c. this is covered on the
What are stress concentrations, what causes them, and why should engineers be concerned about them?
steam enters the turbine of a cogeneration plant at 7 mpa and 500 degc. one quarter of the steam is extracted from the
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