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a disk has a mass of 4kg and a radius of 90mm, it is at rest when it is placed in contact with the belt, which moves with a constat speed (v =15m/s). knowing that friction is .25 between the disk and the belt. Determine the number of revolution by the disk.
What are the percentages of the total heat absorption taking place in the economizer, boiler drum and the superheater, respectively? Assume cp of air and water as 1.005 kJ/kg K and 4.2 kJ/kg K, respectively.
Ideal vapor-compression refrigeration cycle, An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar
Design of absorption column and the cooler. Process design of other units should be completed along with pipe sizes.
Determine the power of the pump. The efficiency of the pump is 65%.
Steam enters the turbine of a simple vapor power plant with a pressure of 160 bar and a temp of 560 C and expands adiabatically to 0.08 bar
Determine the minimum thickness of fibreglas insulation that needs to be used in the wall in order to avoid condensation on the outer surfaces.
Finding Metal Removal Rate In an electrochemical machining operation, the frontal working area of the electrode is 2.5in squared
Refrigerant 134a leaves the evaporator as saturated vapor at 1.4bar and is heated at constant pressure to 20 degrees C before entering the compressor.
The maximum take-off mass of an Airbus A380 passenger jet is about 600 000 kg. The lift is provided by the wings, which have a total area of 845 m2.
An auto speedometer is graduated in 5 mph increments and has an accuracy rated to be within ±4%. Estimate the uncertainty in indicated speed at 60 mph.
a first class lever in static equilibrium has a 50lb resistance force and a 15lb effort force. the levers effort force is located 4ft from the fulcrum. what is the actual mechanical advantage of the system?
Plot the spectral blackbody emissive power of the sun versus wavelength in the range of 0.01 micro m to 1000 micro m?
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