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A high-velocity water jet at 30 degrees celcious is proposed for use as a cutting device with possible applications in metal, concrete, and plastic. A sapphire nozzle with inlet diameter of 0.015m and outlet diameter of 1 x 10^-4m uses liquid water at a mass flow rate of 0.0065kg/s. The water discharges to 0.1MPa. IF the flow is isothermal, determine the pressure of the water source nedded to operate this device and the outlet velocity of the water
a proposed steam power plant design consists of an ideal rankine cycle with superheat and reheat. steam enters the
an air-conditioner with refrigerant 134a as the working fluid is used to keep a room at 26 c by rejecting the waste
a 6 nominal pipe size schedule 40 steel pipe has a chamfered entrance and 300 ft. long. the velocity is 20 ft per sec.
the walls of an insulated lunch box are made of inch-thick styrofoam with a thermal conductivity of 0.05wmk. if an ice
a spherical shell made of a material with a density of 1600 kgm3 is placed in water. if the inner and out radii of the
there are three gears one big one and two little ones. the two smaller ones interact with the big gear. the big gear
A car accelerates uniformly rest to 81 ft/s over a distance of 700 ft along a curve of 800ft radius .Determine the magnitude of the total acceleration at the instant that speed of 81ft is reached.
a thin plastic membrane is used to separate helium from a gas stream. under steady-state conditions the concentration
geothermal energy systems extract heat that is stored below the earths crust. for every 300 ft below ground the
saturated liquid water at 25 degrees c is pumped to a pressure of 5 mpa in an isothermal process. the specific work
Two flat, rectangular plates with a lateral dimension w*l lie parallel, one above the other, a distance h apart. The gap between them is filled with molten polymer.
a piston cylinder device initially contains steam at 200 kpa 200 degree c and 0.4 m3. at this state a linear spring is
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