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A vibratory system with a moving base has a mass of 300 kg, a spring with a stiffness of 40000 N/m and a damper with an unknown damping constant. It is observed that the mass vibrates with an amplitude of 10 mm when the support oscillates with an amplitude of 2.5 mm at resonance (r=1) Determine:
(a) the damping coefficient
(b) the dynamic force amplitude acting on the base (Fr)
Water flows at a rate of .04 m^3/s in a .12 meter diameter pipe that contains a sudden contraction to a .06 m pipe. Determine the pressure drop across the contraction section. How much of this pressure difference is due to losses and how much is due ..
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air enters the compressor of an ideal closed air-standard brayton cycle at 100kpa with a volumetric flow rate of 5m3s.
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