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A variable-speed electric motor, having an unbalance, is mounted on an isolator. As the speed of the motor is increased from zero, the amplitudes of vibration of the motor are observed to be 0.55 in. at resonance and 0.15 in. beyond resonance. Find the damping ratio of the isolator.
a cast-iron tube is used to support a compressive load. knowing that e 69 gpa and that the maximum allowable change in
suppose that the failure time distribution for a product can be approximated by a normal distribution with mu 3 and
Gasoline (density = 680 kg/m^3 and kinematic viscosity = 4.29x10^-7 m^2/s) is transported at a rate of 150 L/s for a distance of 2 km. The surface roughness of the piping is 0.03 mm. If the head loss due to pipe friction is not to exceed 10 m, determ..
A free vortex with a circulation C and a sink with a flow rate m are place at a height h above a solid plane. Assuming inviscid flow, determine a) the flow velocity at points A and B; b) the difference between the pressures at the points.
A closed rigid tank of volume 3m^3 contains a two-phase liquid-vapor mixture of H2O at 110C with a quality of 34.5%. The tank then receives energy by heat transfer until the water becomes a saturated vapor. Determine the final pressure and temperatur..
A cold air chamber is proposed for quenching steel ball bearings of diameter D = 0.2 m and initial temperature Ti = 400°C. Air in the chamber is maintained at - 15°C by a refrigeration system
determine the work done by a 1-lb fluid system as it expands slowly within a piston-cylinder arrangement from an
a water cannon for rock tunneling operates by using compressed gas for accelerating a 65-kg high-strength titanium
A form of corrosion called pitting corrosion can occur in aluminum in fresh water. As the name suggests, pits form on the surface of aluminum in this type of corrosion. The pit depth, d follows a cube root relationship time, t:
Refrigerant 22 enters an insulated compressor operating at steady state as saturated vap or at -16 C with a mass flow rate of 1.5 kg/s. Refrigerant exits at 7 bar, 70 C. Changes in KE and PE from inlet to exit can be ignored. Determine: (a) the volum..
A turbojet aircraft flies with a velocity of 900 km/h at an altitude where the air temperature and pressure are -35 degrees C and 40 kPa. Air leaves the diffuser at 50kPa with a velocity of 15 m/s, and combustion gases enter the turbine at 450 kPa an..
Is blue sky polarized, is the sun polarized? Blue light reflected from a glass table polarized? Why do some sunglasses block glare of off water and others do not? What other applications are there for polarizers?
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