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Refrigerant-134a at 140 kPa and 10°C is compressed by an adiabatic 0.7-kW compressor to an exit state of 700 kPa and 50°C. Neglecting the changes in kinetic and potential energies, determine
(a) the isentropic efficiency of the compressor,
(b) the volume flow rate of the refrigerant at the compressor inlet, in L/min, and
(c) the maximum volume flow rate at the inlet conditions that this adiabatic 0.7-kW compressor can handle without violating the second law.
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that theearth is a uniform sphere and that its path around the sun is circular.
A container holds 2.0 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of an 8.8x10-3 kg bullet with a speed of 880 m/s. What is the Kelvin temperature of the gas?
Two identical clocks are set to 12 noon time when on the ground at rest relative to the ground. What will the moving clock read if the first clock reads 6 pm
A .50kg sample of water is at 15.0C in a calorimeter. A 0.040 block of zinc at 115C is placed in the water. Find the final temperature of the system.
If the tension in each chain at the lowest point is 408 N, find the child's speed at the lowest point.
A current of 15.0 mA is maintained in a single circular loop of 2.40 m circumference. A magnetic field of 0.870 T is directed parallel to the plane of the loop. Calculate the magnetic moment of the loop
A charge of +1 coulombs is placed at the 0 cm mark of a meter stick. A charge of +4 coulombs is placed at the 100 cm mark of the similar meter stick.
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 448 m/s.
in the bohr model of the hydrogen atom an electron in the 4th excited state moves at a speed of 1.37 105 ms in a
What mass of steam at 100 degrees Celcius must be mixed with 165g of ice at its melting point, in a thermally insulated container, to produce liquid water at 60 degrees celcius?
One end of a wire is attached to a ceiling, and a solid brass ball is tied to the lower end. The tension in the wire is 140 N. What is the radius of the brass ball
A sinusoidal voltage ?v = (75 V) sin (100t) is applied to a series RLC circuit with L = 50 mH, C = 160 ?F, and R = 34 ?. What is the impedance of the circuit
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