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1 kg of air is polytropically compressed reversibly from 5 bar to 10 bar from an initial temperature of 300oC. Find the transferred heat and the change in entropy. Take the polytropic index as 1.25.
The acceleration of a particle is defined by the equation a = -k*sqrt(v), where k is a constant. When t=0, the initial position is xo=0 and the initial velocity is vo=81ft/s. Knowing that v =36ft/s when x=18ft, determine the velocity of the particle ..
argon gas flows through a rigid nozzle at steady-state-steady flow. the inlet flow velocity is small. the gas exits the
Calculating a Constant Pressure Process, In a constant pressure, nonflow process, 6Btus of heat are added to a gas while the volumes change from 1.6ft^3 to 2.0ft^3
Estimate the work done by the heart to keep the blood circulating. The fluid that flows through the heart has a uniform velocity profile. The system can be modeled as steady-state with one inlet and one outlet. Neglect frictional loses in the pumping..
a cruise ship is traveling at a speed of 24.0 . a speedboat with a late passenger is heading toward the cruise ship at
one hundred btu of heat are transferred directly from a thermal-energy reservoir at 1200 or to one at 600 or. calculate
rope bca passes through a pulley at point c and supports a crate at point a. rope segment cd supports the pulley and is
a cylindrical flask is fitted with an airtight piston that is free to slide up and down. a mass rests on top of the
a carnot refrigerator is maintaining foodstuffs in a refrigerated region at 2degc by rejecting heat to the atmosphere
An air cushion vehicle is supported by forcing air into the chamber created by a skirt around the periphery of the vehicle as shown in Fig. P3.106. The air escapes through the 1.7-in. clearance between the lower end of the skirt and the ground (or wa..
a 50 hp electric motor is powering a pump that operates for 8 hours a day for 360 daysyear. for an industrial
a steel shaft has fatigue strength of 300 mpa for 80000 cycles of fully reversed loading. the same shaft fails by
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