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A firm wishes to determine the efficiency and utilization of a work center composed of 3 machines each working 16 hours per day for 5 days a week. A study undertaken by the materials management department found that over the past year the work center was available for work 12,000 hours, work was actually being done for 10,000 hours, and work was performed 11,480 standard hours. Calculate the utilization, efficiency, and demonstrated weekly capacity. Assume a 50-week year.
in an air-standard otto cycle the air at the beginning of the compression stroke is at 95 kpa and 22 degrees c and the
a heat pump cycle is executed with r-134a under the saturation dome between the pressure limits of 1.6 mpa and 0.2 mpa.
car a starts from rest at t0 and travels along a straight road with constant accelaration 2ms2 until it reaches a speed
The stakes at points A, E, and F may be modeled as pins, and the weights of all members except the concrete may be neglected. If the concrete is modeled as a fluid with 90 lb/ft3 specific weight, determine the force supported by members BC and DF.
Air passes through a 1.5m-diameter ventilation duct at a velocity of 3.0 m/s. Calculate the volumetric flow rate and the mass flow rate assuming that the air has a density of 1.12 kg/m3.
A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..
a hydrocooling unit can cool fruits and vegetables from 30 to 5 oc at a rate of 20000 kgh under the following
a long pryoceram rod with a diameter of .08m is clad with a very thin metallic tube for protection. the bonding between
If quenching is to occur until the surface temperature of the balls reaches 100°C, how long must the balls be kept in the oil? What is the center temperature at the conclusion of the cooling period?
Find the moment of inertia of a hoop ( a thin -walled, hallow ring) with mass 5 kg and radius 2m about an axis perpendicular to the hoop's plane at an edge.
Assuming that imported oil cost $55 per barrel, how long did it take for the savings in import to equal the investment in the program?
0.09m3 of a fluid at 0.7 bar are compressed reversibly to a pressure of 3.5 bar according to a law pvnconstant. the
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