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A pump operating at steady state draws water at 55°F from 10 ft underground where the pressure is 15 lbf/in.2 and delivers it 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.
air is compressed in a reversible steady-flow system from 15 psia and 100?f to an exit pressure of 100 psia. the
1. Determine the thermal conductivity of the carbon nan- otube of Example 3.4 when the heating island tempera- ture is measured to be Th = 332.6 K, without evaluating the thermal resistances of the supports. The conditions are the same as in the exa..
a force p acts on a block having a mass of m with the block resting on a rough incline. the coecients of static and
one kg of water vapor at 200 kpa fills the 1.1989 m3 left chamber of a partitioned system. the right chamber has twice
a potato is baked in an oven at 200degc. the potato is then removed from the oven and put on a table in the kitchen.
What are the recursive equations for each model and what is their fixed point? Compare the adjustment of prices in each model.
Air enters a 0.6 m diameter fan at 16 deg C, 101 kPa, and is discharged at 18 deg C, 105 kPa, with a volumetric flow rate of 0.35 m^3/s.
Compute the electrical conductivity of a 3.6-mm diameter cylindrical semiconductor specimen 91 mm long in which a current of 0.90 A passes in an axial direction. A voltage of 7.5 V is measured across two probes that are separated by 61 mm. (b) Comput..
a steel angle iron loaded in compression is added to a structure in order to increase its rigidity. although the two
a gas expands in a piston-cylinder assembly from p1 8.2 bar v1 0.0136 m3 to p2 3.4 bar in a process during which the
what size of pipe would be required to move 30 milliliters of air in one minute at a pressure of 100 psi.
Find the equations for the trajectories for Case WB (a > 0.0 0. a2 > 40) and Case IVC (α >0. β> 0. α2 = 4β). Are the straight lines indicated in class trajectories? What are the equations describing them
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