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A bridge is found to vibrate violently when a vehicle, producing a harmonic load of magnitude 600 N, crosses it. By modeling the bridge as an undamped spring-mass system with a mass 15,000 kg and a stiffness 2 MN/m, design a suitable tuned damped vibration absorber. Determine the improvement achieved in the amplitude of the bridge with the absorber.
a rigid well insulated tank contains a two-phase mixture consisting of 0.07lb of saturated liquid water and 0.07lb of
a well insulated piston-cylinder assembly is connected to an air supply line at 8 bar as shown in the figure. initially
consider an air-standard otto cycle. what is the efficiency of the otto cycle if the compression ratio is 10 and the
what is the actual mechanical advantage of the system?
consider a velocity field of an incompressible flow where the x amp y components of velocity are given by ucx amp v-cy
A wood beam reinforced by an aluminum channel section is shown in the figure. The beam has a cross section of dimensions 150 mm by 250 mm, and the channel has a uniform thickness of 6 mm.
A stiletto heel has a semi-circular cross-section with radius of 0.25 in. Due to walking over irregular surfaces and shifts in body weight, moments of up to 30 lb.-in. can act where the heel attaches to the shoe. Determine the maximum tensile or comp..
The area under an engineering stress-strain curve up to fracture is the en- ergy/volume. The area under a true stress-strain curve up to fracture is also the energy/volume. If the specimen necks, these two areas are not equal.
consider a cogeneration power plant modified with regeneration. steam enters the turbine at 9 mpa and 400 c and expands
superheated ammonia enters an insulated nozzle at 200c and 800kpa. the flow through the low velocity inlet is at
the fresh feed to an ammonia production process contains nitrogen and 75 excess hydrogen in stoichiometric proportion
5 lbm of air is compressed in a piston cylinder assembly from 1 bar 300k to 5 bar according to a polytropic process
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