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7.92 A pump operating at steady state draws water at 55°F from 10 ft underground where the pressure is 15 lbf/in.2 and deliversit 12 ft above ground at a pressure of 45 lbf/in.2 and a mass flow rate of 30 lb/s. In the absence of internal irreversibilities, determine the power required by the pump, in horsepower, ignoring kinetic energy effects. The local acceleration of gravity is 32.2 ft/s2. Would the actual power required by the pump be greater or less than the calculated value? Explain.
you have a cylindrical beverage container that has been sitting in your hot car all day and is now at a temp of 50 deg
an aluminum plate 0.5 cm thick is to withstand a force of 50000 n with no permanent deformation. if the aluminum has a
a 500w cylindrical resistance heater is 1m long and 0.5cm in diameter. the resistance wire is placed horizontally in
a simple ideal rankine cycle with water as the working fluid operates between the pressure limits of 4 mpa in the
Calculate the exact integration result using Matlab symbolic tools and calculate the errors in calculating work done
a fixed amount of water vapor initially at 20mpa 520c is cooled at constant volume until its temperature reaches
200mm DN pipeline has to deliver 80m³/h of water at a discharge pressure of 5,550 kPa. Approximately how many pump stations would be needed for a pipeline 300km long?
The packages are placed on the belt so that they are in contact with each other and at rest. Determine which, if any, of the packages will move and the friction force acting on each package
the rate of heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine.
One kilogram of nitrogen gas (N2) is undergoes an isothermal compression from 1 bar, 20C to a final pressure of 12 bar. During the process, the nitrogen transfers heat through a wall to a thermal reservoir with a temperature of 10C.
A heat engine (HE) of 35 % thermal efficiency is used to drive a refrigerator having a COP of 4 , what is the heat input into the engine for each MJ removed from the cold body by the refrigerator? If this system is used as a heat pump, how many MJ of..
The highest level is a main program that implements a digital clock using an LED or LCD display. Two, three, or four momentary switches will be used to control the operation of the digital clock.
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