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The mass m , stiffness k and the natural frequency Wn of an undamped Single degree of freedom system are unknown. These properties are to be determined by harmonic excitation tests. At an excitation frequency of 4 Hz, the response tends to increase without bound(ie a resonant condition). Next, a weight of deltaW= 5lb is attached to the mass m and the resonance test is repeated. This time resonance occurs at a frequency of 3 Hz. Determine the mass and the stiffness of the system.
A sightseeing tourist submarine is constructed. The portals along the side can be assumed to be essentially flat, vertical and 1 meter in diameter. Assume a specific weight of seawater of 10,000 N/m3.
The following boundary conditions apply at x=0, ca = Keqcao and T=To and at x=L, (dco/dx)=0 and (dT/dx)=0. Determine the concentration and temperature profiles for this system.
A completely mixed activated-sludge plan is being designed for a wastewater flow of 3.0 mgd. The BOD of 225 mg/l is 200 mg/l soluble. The effluent soluble BOD requirement is 7 mg/l (70 percent of the total 10 mg/l).
A closed cylindrical tank filled with water has a hemispherical dome and is connected to an inverted piping system. The liquid in the top part of the piping system has a specific gravity of 0.68.
determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
A simply supported steel 'I beam' is made of three 1"*8" plates with a mass of 898.4 lbmass each as shown in I beam form. Steel has a modulus of elasticity of 30*10^6 psi. The beam is allowed to deflect 1.05 inch.
A sag vertical curve along an existing vertical alignment begins at station 23+45 and ends at station 30+25. The initial grade coming into the curve is -2% and the grade out is +5%. What is the finished grade elevation on the curve at station
You have just received $10,000 witch which you can do anything. You have decided to invest the money over a long period of time and then use it to make a down payment on a vacation home.
How to draw bending moment diagram for this shape and the value of the moment in critical sections assume that the distributed load (w) KN/M and the concentrated load
The magnetic declination of 1986 was 5 degrees 15 minutes. The magnetic bearing of a line was N 89 degrees 49 minutes W. At todays present the magnetic bearing of a line is S 88 degrees 20 minutes W.
Use the Bernoulli equation to describe how this manometer can be used to measure the flow rate through the meter.
The driver strikes the sign at a speed of 25 mi/h. If the student was traveling at 55 mi/h when the sign was spotted, what was the drivers associated reaction time in seconds
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