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Five kilograms of water, initially a saturated vapor at 100 kPa, is cooled to saturated liquid while the pressure is maintained constant. Determine the work and heat transfer for the process, each in kJ. Show that the heat transfer equals the change in enthalpy of the water in this case.
the 20 kg mass is released from the position shown and falls on the linear spring k 30000 nm. use conservation of
determine the internal energy change of air in a rigid container as its temperature is increased by transferring
Estimate the temperature of the hottest point in the billet after five minutes of quenching. Neglect end effects; make the calculation for a cylinder of the given diameter but of infinite length.
a steel pipe of 12-in. outer diameter is fabricated from 14in. thick plate by welding along a helix which forms an
Two equal masses are connected on either side of a pulley. One of the masses rests on an inclined plane with angle of inclination of b. The other one hangs in mid air.
for the following cross sectiondetermine the coordinates x and y of the centroid c of the area shown in the
a city engineer knows that she will need 25 million in 3 years to replace toll booths on a toll road in the city.
reinforced concrete highway pavement has a depth of 250 mm with 24 mm diameter steel rebars located 180 mm from the
consider heat transfer to a turbulent boundary layer with no pressure gradient or transpiration but with a vanishingly
to a man walking with a speed of 2 ms the rain appears to fall vertically. if the velocity of rain is 4 ms calculate
in a machining operation an 8 minute tool life was achieved at a cutting speed of 500 fpm. at a cutting speed of 250
a piston-cylinder device contains an ideal gas. the gas undergoes two successive cooling processes by rejecting heat to
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