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A motor delivers 240 W through the drive shaft to a paddle wheel that agitates liquid water in a closed insulated tank maintained at 1 bar. The initial temperature of water and wheel is 20 degrees C. Determine the temperature rise of the contents after 0.8 h if the mass of the water is 6 kg and the mass and specific heat of the paddle wheel are 0.4 kg and 0.96 kJ/kg-K, respectively.
fluid a available at 10oc is to be heated in a one-shell-pass four-tube-pass exchanger heat using fluid b available at
2 kg of water is contained in the vertical frictionless piston cylinde device.the mass of the piston is such that the
the initially stationary uniform disk of mass m1 and radius b is allowed to drop onto the moving belt from a very small
Determine the smallest horizontal force required to pull out wedge A. The crate has a weight of 200 and the coefficient of static friction at all contacting surfaces is = 0.7. Neglect the weight of the wedge.
steam at 2.5 mpa and 400 c enters an adiabatic steam turbine with a low velocity and leaves with a velocity of 180 ms
suppose that you have a basin of 35c warm water that you use to run a heat engine that cools its substance with air at
a cylindrical nuclear fuel rod under steady conditions in a cooling bath has a 2-d temperature distribution of
an airplane was moving with a velocity equal to 300mph when the velocity was increased with uniform acceleration to
the concrete beam is reinforced with three 20-mm diameter steel rods. assume that the concrete cannot support tensile
a very wide sheet of 7075-t651 aluminum plate 8mm thick is found to have a single-edge through-the-thickness crack 25
A balloon behaves so the pressure is P = C2V1/3, C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC and the work done by the air.
a he-xe mixture containing .75 mole fraction of helium is used for cooling of electronics in an avionics application.
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