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In the Hartnell governor shown in Fig. 2.71, the stiffness of the spring is N/m and the weight of each ball is 25 N. The length of the ball arm is 20 cm, and that of the sleeve arm is 12 cm. The distance between the axis of rotation and the pivot of the bell crank lever is 16 cm. The spring is compressed by 1 cm when the ball arm is vertical. Find
(a) the speed of the governor at which the ball arm remains vertical and
(b) the natural frequency of vibration for small displacements about the vertical position of the ball arms.
air enters the compressor of a cold air-standard brayton cycle at 100 kpa 300 k with a mass flow rate of 6 kgs. the
How many hours require prior to remove the insulation after shutdown - I investigated that upon shutdown the furnace cracking, our maintenance immediately remove the insulation of the piping.
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Steam at 500oF and 50 psi is fed at the rate of 1 lbm/sec to an adiabatic compressor where its pressure is raised reversibly to 650 psia. Use data from the steam table to determine the changes in the enthalpy and entropy of the steam in the compressi..
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