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The instrument in Prob. 11.49 is operated under a critically damped situation. Approximately what will be the acceleration attenuation at the natural frequency, expressed in dB?
Prob. 11.49:
A seismic-type instrument has a natural frequency of 60 Hz. What is the maximum percent overshoot in acceleration response for damping ratios of 0.2 and 0.3? At what frequencies do these maximum values occur?
The cold cranking amperes (CCA) of a conventional lead-acid automobile battery is the amount of current the battery can provide at 0°F for 30 seconds and maintain at least 1.2 volts per cell (or 7.2 volts for a standard 12-volt battery). If a batter..
steam enters an adiabatic turbine steadily at 3 mpa and 400 degree c and leaves at 50 kpa and 100 degree c. if the
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Replacing about half of the steel-based materials in a car can reduce the weight of the vehicle by almost 60%. This can lead to nearly a 30% increase in fuel efficiency. What kinds of materials could replace steel in cars (pick at least two)? What wo..
Find the response of the system, using Laplace transform. Assume the initial conditions to be zero.
the suspended load exerts a force F=600 lb at A, and the weight of the bar OA is negligible. Determine the tensions at the cables and the reactions at the ball and socket support O
Determine the stresses sx sy and sz
consider a model of a bone with a cemented prosthesis where the outside radius of the bone is ro the radius of the
Why does the definition of NPSH include the dynamic head of the fluid? Isn't cavitation based only on the difference between the static head and the local vapor pressure?
in a pharmaceutical plant a copper pipe kc 400 wm.k with inner diameter of 20 mm and wall thickness of 2.5 mm is used
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