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A gas initially at 14 bar and 60°C expands to a final pressure of 2.8 bar in an isothermal, internally reversible process. Determine the heat transfer and the work, each in kJ per kg of gas, if the gas is (a) Refrigerant 134a, (b) air as an ideal gas.
Sketch the processes on p-v and T-s coordinates.
It takes 15 revolutions of the screws for the full range motion necessary to unload/load a work piece. The DC motor constant, KM, is 0.6 rev/V/s and there is a 20 Volt power supply. Assuming a constant proportional control gain, KP of 4 volts/rev, ho..
A vibrometer has an undamped natural frequency of 10Hz. and damped natural frequency of 8 Hz. Find the lowest frequency in the range to infinity at which the amplitude can be directly read from the vibrometer with less than 2 percent error.
a police car traveling at 101.7 kmh is traveling west chasing a motorist traveling at 77.0 kmh.a what is the velocity
water vapor enters a turbine at 6 mpa and 400degc and leaves the turbine at 100 kpa with the same specific entropy as
during some actual expansion and compression processes in piston-cylinder devices the gases have been observed to
Consider horizontal pipe carrying water at 70 °F. It is given that the pressure drop over a 100-ft length of 1-in-diameter is 5.0 psig. Determine (a) the Reynolds number, (b) the friction factor, and (c) the flow rate of the water?
a computer cpu chip operates at steady state with d-c electrical input of 4.5 amps at 9 volts. to prevent the chip from
a 50 cm long 800 w electric resistance heating element with diameter .5 cm and surface temperature 120c is immersed in 60 kg of water temperature to 80c. also determine the convection heat transfer coefficients at the beginning and at the end of t..
A mason stretches a string between two points 50 ft apart on the same level with a tension of 10 lb at each end. If the string weighs 0.1 lb, determine the sag h at the middle of the string.
Steam at 15 bar and 350 degrees C is expanded through a 50% reaction turbine to a pressure of 0.14 bar. The stage efficiency is 80% for each stage and the reheat factor is 1.05.
A centrifugal air compressor is driven at 40,300 rpm. The inlet eye of the compressor has a hub diameter of 2.09 in and an outer diameter of 4.56 in. The impeller tip diameter is 6.97 in. It has been found the compressor ratio is 2.44 and the air flo..
a particle is moving along a circular path having a radius of 5.7 in. such that its position as a function of time is
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