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A shaft with a diameter of 100 mm rotates at 1500 rpm. A fluid-film bearing is designed to support a 5 kN load. Assume the bearing's L/D ratio is 0.5, and the clearance is 0.5 mil.
If the convective heat transfer coefficient is 13.5 W/ m2K, estimate when the beverage will have a temperature of 15degreeC in mins.
A water cooler for drinking water should cool 1 ft^3/h from 65 F to 50 F using a small refrigeration unit with at COP of 2.5. Find the rate of cooling required and the power input to the unit.
Using the method of AGMA, calculate the maximum power that can be transmitted based upon the allowable bending fatigue strength, SF = 525 MPa using design factor of 2.
Air flows steadily at rate of 0.4kg/s through an air compressor, entering at 6m/s with a pressure of 1 bar and specific volume of 0.85m3/kg, leaving with 4.5m/s with a pressure of 6.9 bar, and speci
A highway patrol officer on the ground uses a radar gun to measure the speed of a suspect's car to be 60 m/s. Calculate the relative velocity of the suspects car and the patrol car.
Air enters a compressor operating at steady state with a volumetric flow rate of 8 m3/min at 23°C and 0.12 MPa. The air is compressed isothermally without internal irreversibilities, exiting at
Also what wind speed can tip off this pole if we consider the wind is maximum at the top of the pole.Consider the total weight to be 100lb.
Determine the final pressure, temperature, and specific volume in each vessel as well as the partial pressures for each component in each vessel. Also determine the change of entropy for this proces
Water flows from a large tank through a 20-m long, 3 cm by 2 cm rectangular pipe. Flow exits from the tube with velocity 2 m/s when the water level in the tank is 8 m above the pipe exit.
What decrease or increase in speed is required so that the satellite would be put on an elliptical path to reach an altitude of 24.000 km?
Water vapor enters a turbine operating at steady state at 30 MPa, 600 oC and expands adiabatically to 6 MPa. If the isentropic efficiency is 80%, determine the work developed using the generalized p
Air is moving between two parallel plates at 40C and 6.667 m/s. What is the minimum distance H between the plates so that T(H/2)=40C when both plates are at 100C?
Determine the concentration of Cl (in wt%) that must be added if this substitution occurs for 5% of all the original hydrogen atoms.
A heat pump is absorbing heat from the cold outdoors at 5oC and supplying heat to a house at 25oC at a rate of 18,000 kJ/h. If the power consumed by the heat pump is 1.9 kW, the COP of the heat pum
The heat exchanger is not insulated and is losing heat at a rate of 25 kJ/s. If the exit temperature of hot air is 20oC, the exit temperature of cold water is (oC)?
A bar of rectangular cross section 20mm × 5mm with a central hole of diameter 4mm is subjected to a tensile force F which fluctuates between maximum and minimum values of 10 kN and 8 kN respec
After 10 lb/hr of the oil is removed from the potato chips in the separation unit, what is the mass fraction of oil on the potato chips (which continue on to the seasoning step)?
Explain Viscous Damping with a sketch. Provide a model that may be used in studying vibrations. Given M = 2, B = 8 and K = 6 determine the necessary parameters.
Determine (a) the pressure, volume and temperature at the state points of the cycle (b) the thermal efficiency of the cycle (c) the work done per cycle. Solution for b) 48% Solution for c) 44.4 kJ.
A refrigerator should remove 500 kJ from some food. Assume the refrigerator works in a Carnot cycle between -10 degrees C and 45 degrees C with a motor compressor of 500 W. How much time does it ta
A large stationary diesel engine produces 15 MW with a thermal efficiency of 40%. The exhaust gas which we assume is air, flows out at 800K, and the intake is 290K. How large is the mass flow rat?
Using the isothermal transformation diagram for a 1.13wt% C steel alloy (found in Callister), determine the final microstructure (in terms of just the microconstituents present).
The static pressure at the pump inlet must not be lower than -6m of water gage. Determine the diameter of the standard commercial steel pipe that will give the required performance.