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The mean value of the coefficient of friction is 0.25, and the actuating force is 5 kN. Find the maximum pressure and the torque capacity using the (a) uniform wear (b) uniform pressure models.
A 50 lb. weight is attached to the end of a 10 inch long beam. Determine the natural frequency both for the horizontal and vertical directions. Neglect the mass of the beam.
If the mass is displaced two inches and then released, what will be the deflection after two complete cycles of the resulting vibration?
The rocker of a crank-rocker linkage is to have a length of 500mm and swing through a total angle of 45 degrees with a time ratio of 1.25. Determine a suitable set of dimensions for r1, r2, and r3.
Convectipon coefficient is 12 btu/hrft^2R. Cylinder diameter is 4 in. Calculate heat loss per fin for a base temperature of 450 F and environment temp of 100 F.
A rigid 10m3 tank contains water initially at 120 C, with 60% liquid and 40%vapor by volume. Calculate the heat transfer to the tank.
Determine the mass flow rate of liquid water required to produce an exit state of saturated vapor at 5 bar. What is the rate of entropy generation?
Determine rate of heat transfer from the wire and if air mass flow rate over wire is 0.15 kg/s, determine air temperature gain from the haest exchange process.
Draw the temperature distributions along the heat exchanger, indicating flow direction and labeling the temperatures.
Determine the radial force of the slider a when t=0.2s. what is the transverse force on the slider at t=0.2 s. What is the resultant force due to acceleration?
The flow rate is 2 kg/s. What is the rate at which energy is transferred as heat to the pipe? Show the process on a T-s diagram.
How much throttling is necessary for this scheme to work? Compute the quality at state 1 for the measurements below, assuming the fluid is water.
How many square feet of collector would be required for a small desert power plant producing 10 kW of electric power if the electric power output is 8 percent of the collected solar energy?
The mercury emerges as a saturated liquid at 0.4 psia. Calculate the rate of the energy transfer as heat from the mercury side of the condenser?
Compute the shaft-power output and isentropic efficiency, assuming that the device is adiabatic but considering kinetic and potential energies.
An adiabatic piston-cylinder system contains a 1000-W immersion heater and 4kg of H2O initially at 1 atm and 96 percent quality.
If a balloon is filled with Helium until the diameter is (30.0cm) and the pressure is (1.20 atm), how many balloons can be filled by the tank?
Determine rate of heat transfer from the wire and if air mass flow rate over wire is 0.15 kg/s, determine air temperature gain from the heat exchange process.
Find: a) Draw a schematic of the power cycle, b) Determine the maximum thermal efficiency that could be expected for this power cycle.
The pressure P, both as a function of x. Also sketch qualitatively dP/dx and P, if the viscosity of the liquid is decreasing as it moves downstream (i.e., the fluid is being heated).
The combustion gases leave the heat exchanger at 380 K. Assume that all compression and expansion processes are isentropic. Determine the thermal efficiency of the combined cycle.
Determine the power required at steady state, in hp, to heat the building using electrical resistance elements and compare with the minimum theoretical power that would be required by a heat pump.
Calculate the velocity v of each 25 kg cylinder after the 20 kg cylinder has dropped 2 m. The 10 kg cylinder of case (a) is replaced by a constant force of 98.1 N (10 x 9.81) in case (b).
The cyclone has an efficiency closely approximated by the Lapple efficiency equation, with 50% cut diameter equal to 8 μm. Calculate the mass collection efficiency of the cyclone with this aeroso
Calculate the collection efficiency for this device, for a mono-disperse aerosol, with dp = 5.0 μm. How many such devices would have to be placed in series to achieve a collection efficiency grea