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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.
determine the time needed for the velocity to become v=vf. initially the particles falls from rest.
a mass of .25 kf of co2 at a termperature of 300k and pressure of 100 kpa is heated at constant pressure to a volume
question 1 give examples from your own experience of situations where friction is a desirable and b
a 5 kg object a and a 10 kg object b undergo an oblique central impact. the coefficient of restitution is e 0.6.
A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
a 1000 ft. long bridge with a steel superstructure steel alloy a36 is subjected to seasonal temperature extremes of -40
the ball is kicked with an initail speed of 8 ms at an angle of 40 degrees with the horizontal. find the equation of
calculate the overall efficiency the heat rate mw and the total fuel rate kgs of a combined-cycle power plant 1 if no
a non-ideal regenerative rankine cycle for a power plant shown below where there is no heat loss or pressure drops in
a piston weighing 35 lb slides down a vertical cylinder. the radical gap between the piston and cylinder is 0.002 in.
in figure below a charged particle moves into a region of uniform magnetic field goes through half a circle and then
methane and steam are added to a reactor at 1 bar and 300 oc where the following two reactions occur isothermallych4
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