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Suppose you needed to reduce the diameter of a rod 20% and could choose between drawing it or extruding it through the same die. Assume that the friction conditions are the same, but not zero. Would each process require the same amount of work? If not, which would require more work and why? Would each process require the same amount of force? If not, which would require more force and why?
a rigid well-insulated tank contains a two-phrase mixture of ammonia with .0025ft3 of saturated liquid and 1.5 ft3 of
a piston-cylinder device with a free floating piston contains 2 kg of water as a saturated liquid with a pressure of
a frame ub was moved along its own o-axis a distance of 6 units then rotated about its n-axis an angle of 60then
An airplane flies at 400 mph at 1600 ft altitude on a standard day. The plane climbs to 50,000 ft and flies at 725 mph. Calculate the Mach number of flight in both cases.
steam at 1 bar enters an adiabatic heat exchanger with a quality of 0.89 and exits as a saturated liquid. the steam is
a c-130 pilot desires to fly a low-level navigation mission at 4 n milesmin 240 kn ground speed. winds are forecast out
In an air-water vapor mixture at 30°C, the partial pressure of the water vapor is 1.5kPa, and the partial pressure of the dry air is 100.5kPa. What is the relative humidity of the air-water vapor mixture?
a centrifugal pump can provide a 20-m head rise at 75 revmin. if the rotation speed increases to 90 revmin what will be
a 2.0 kg of water at 90 deg. c and 1 bar is placed in a vertical cylinder and sealed with a massless piston. the piston
consider an adiabatic turbine with an isentropic efficiency of 85. the inlet pressure and temperature are 3.50 mpa and
a gravimetric analysis of atmospheric air results in approximately 23.15 oxygen and 76.85 nitrogen. what is the partial
you are to design a balloon capable of lifting 200 kilograms the mass of the gas in the balloon must be 200 kilograms
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