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A spring-mass is excited by a force F= sin(wt) . At resonance, the amplitude is measured to be 0.8 cm. At 0.85 resonant frequency, the amplitude is measured to be 0.6 cm. Determine the damping factor (zeta) of the system.
Clearly identify and justify the criteria used for the comparison and the logic behind the scoring process. Prepare a 15-minute briefing and an executive summary suitable for a conference with your local congressperson.
A horizontal platform rests on four vertical springs, each of stiffness 15kN/m and mass 0.25kg. what will the frequency of oscillation of the table be if it has a mass of 2.okg
liquid water state 1 and steam state 2 are mixed in a steady flow open feedwater heater and the mixture leaves at state
Space stations don't need to be round to have artificial gravity. The tethered spacecraft in the diagram to the right represents an alternative design. Put the astronauts in a passenger capsule. (Put the "spam in a can" as they say.) Tether it to a h..
a 2011 penny is thrown into a pool of water for luck. what is the force acting on the penny if it lands horizontally on
A first class lever in static equilibruim has a 50 lb resistance force and 15 lb effort force. The lever's effort force is located 4 ft from the fulcrum. What is the actual mechanical advantage of the system?
to test its performance an automobile is driven around a circular test track of diameter d. determine a the value of d
Bypass air exits at 600 m/s while combustion air exits at 1000 m/s. What is the thrust in kN of this engine?
The mass is struck by a sudden sharp blow, giving it instantaneous velocity of 1 m/s radially outward. Show the state of the system before and after the blow on a sketch of the energy diagram.
a small air turbine with an isentropic efficiency of 80 should produce 270 kjkgof work. the inlet temperature is 1000 k
A copper wire having diameter d= 3 mm is bent into a circle and held with the ends just touching (see figure). If the maximum permissible strain in the copper is emax = 0.0024,
although ripening of tomatoes can be retarded by low temperatures storage under refrigeration can cause chilling injury
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