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A fan of 45 kg has an unbalance that creates a harmonic force. A spring-damper system is designed to minimize the force transmitted to the base of the fan. A damper is used having a damping ratio of ζ = 0.2.
Calculate the required spring stiffness so that only 10% of the force is transmitted to the ground when the fan is running at 10,000 rpm.
If the mass diffusivity of hydrogen is 9 X 10-7 m2/s, how much time is required to bring the density of dissolved hydrogen to a value of 1.2 kg/m3 at the center of the sheet?
from fundamentals of engineering thermodynamics book 9.85 for the turbojet in problem 9.84 plot the velocity at the
Gold has an fcc crystal structure. The cell parameter (lattice constant) is 0.408 nm. 1) Determine the distance (d-spacing) between the [311] and [111] planes; 2) Sketch the [110] direction in the unit cell and determine the linear density of gold; 3..
A wooden board AB, which is used as a temporary prop to support a small roof, exerts at point A of the roof a 57-lb force directed along BA. Determine the moment about C of that force.
air flows parallel to an isothermal 100c flat plate with a free stream velocity of 10ms and free stream temperature of
calculate the modulus of elasticity for a polymer composite reinforced with 60.0 vol continuous e-glass fibers in a
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Cel..
a 2 cm-thick composite plate has electric heating wires arranged in a grid in its centerplane. on one side there is air
the wall of a cold storage consists of three layers- an outer layer of ordinary bricks 25 cm thick a middle layer of
As shown in the diagram, two reversible cycles arranged in series both produce the same net work, W out. The first cycle receives energy QH by heat transfer from a hot reservoir at 1000 R and rejects energy Q by heat transfer to a reservoir at an int..
1.25 kg of a gas within a piston-cylinder assembly undergoes an expansion from a volume of v10.1m3 to a volume of
Compute all the stationary spot price equilibria, (x0 , x1, P , r , G, T), in which P = r = 1.
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