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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.
what policies were implemented during and after WW1,WW2,Cold war?
Design a logic circuit that, when enabled with an active-high signal named en, will detect four different ranges of values for a 5-bit input number.
Torque is transferred through two shafts by means of gears. If the diameters of gears B and C are in the ratio 1:2, what should the ratio of shaft diameters be so that both shafts have the same shear stress
A company has been discharging its waste into a holding pit for a long time. For the last several years, the pit has been full and overflowing into a local river. The waste concentration has been nearly constant at 10 mg/L of the pollutant of inte..
Determine the minimum horizontal force P required to hold the crate from sliding down the plane. The crate has a mass of 70kg and the coefficient of static friction between the crate and the plane is μs = 0.45.
Determine the deflection of a simple uniformly loaded beam by the Ritz method,using first one term, then two terms, adn finally three terms in a sine series. Why does the coefficient of sin2piex/L vanish?
Property taxes,insurance and storage will run 5%.What is the owning cost for the dozer?Use the time value method to calculate the depreciated portion of the ownership cost.
fy=50000psi, f'c=3000 span of l=28 ft, dead load not including beam weight = 3 k/ft, live load=3 k/ft, p*=0.5pb, concrete weights=150 lb/ft cubed, use h=d+2.5 inch, assume beam weight =10kN/m and phi=0.90
Then calculate a 6% tax on the total and display the total amount owed (including the tax) Round your answer to two decimal points and include the dollar sign in your display as appropriate.
Determine if a simple supported W 12x26 (A36 steel) beam has the capacity to support loads that produce 50 kips of live-load shear and 20 kips of dead-load shera.
Soil engineers hypothesize that the share of limestone in Austin's soils is the same as that in San Antonio soils. They take 100 bore holes in each region, with 70 showing limestone in Austin and 60 showing limestone in San Antonio.
during construction of the surface layer of asphalt pavement, two samples where taken everyday to measure the asphalt content in the mix to ensure that it is within the specification limits. the target value was set at 5.5 percent with a tolerance..
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