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For the damped spring-mass system shown, the damping factor is ζ = 0.25 and the undamped natural frequency is f = 3 Hz. When the support undergoes the vertical movement y(t) = Y sin 18t (t is the time in seconds), the relative amplitude of the steady-state vibration of the mass m is Z = 10 mm. Determine the amplitude Y of the support displacement.
the initial temperature is 152o c. air expands as an ideal gas from 10 bar and the above temperature to 1 bar in
An air compressor compresses air from 1 bar and 300 K to 5 bar and 540 K. The velocity at the inlet is 70 m/s and the velocity at the exit is 150 m/s. If To = 300 K and Po = 1bar.
A Carnot power cycle operates at steady state with water as the working fluid. The boiler pressure is 200lbf/in^2, with saturated liquid entering and saturated vapor exiting. The condenser pressure is 20lbf/in^2.
refrigerant -134a at 800kPa and 25 C is throttled to a temperature of -20C. determine the pressure and the internal energy of the refrigerant at the final state.
air in a piston-cylinder device has 400 degrees f 1000 kpa with a volume of 3.5 ft3. combustion heats it to 1500 k in a
Methane gas at 25°C, 1 atm enters a reactor operating at steady state and burns with 80% of theoretical air entering at 227°C, 1 atm. An equilibrium mixture of CO2, CO, H2O(g), H2, and N2 exits at 1427°C, 1 atm. Determine, per kmol of methane ent..
Consider a mass M is a distance L above the ground at constant temperature, TR. The mass is released, falls, and hits the ground. The kinetic energy just before it hits is converted to thermal energy due to the collision and is transferred to the gro..
a power washer used to clean the sidingof a hosue has water entering through a hose at 20c 1atm and avelocity of 0.2ms.
The mass flow rate through a steam turbine operating under steady conditions is 100 kg/s. Steam enters the turbine at 12 MPa and 400oC. A mixture of vapour and liquid water exits the turbine at 10 kPa. At the exit state 93% of the mass of the water i..
Sketch the fully annotated velocity triangles for a Parsons turbine stage. Use your sketch to show that the specific work produced per stage is given as w_stage = (C_b)^2 [1 + 2(f/C_b)(cot(B_1))].
a 70kg rectangular door measures 1.2m wide by 2.3m tall. it closes automatically using two hinges with torsional
the acceleration of a particle traveling along a straight line is a8-2s ms2 where s is in meters. if v0 at s0 determine
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