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Refrigerant r-134a flows through a refrigeration system at a rate of 0.12 kg/s. At the entrance to the adiabatic compressor, the r-134a is at 140 kPa and -10°C and exits at 700 kPa and 50°C. Given that the system releases waste heat to the environment at a rate of 24.43 kW, find
a) the power required by the compressor.
b) the isothermal efficiency of the compressor.
c) the heat removed from the refrigerated space.
d) the coefficient of performance for the device.
A nearsighted person wears glasses to correct the problem. How far in cm from the eyes is the person's far point located
Two bullets from opposite sides collide in midair during battle. What fraction of the original kinetic energy was lost in the collision
An aluminum rod is clamped one quarter of the way along its length and set into longitudinal vibration by a variable-frequency driving source. The lowest frequency that produces resonance is 4300 Hz. The speed of sound in an aluminum rod is 5100 m..
A 2.50 syringe has an inner diameter of 4 , a needle inner diameter of 0.24 , and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses syringe to inject medicine into a patient whose blood pressure is 140/100.
A solid disk of mass m1 = 9.3 kg and radius R = 0.23 m is rotating with a constant angular velocity of ? = 33 rad/s. find the initial angular momentum of the rod and disk system
What's the definition of quantum physics, in layman's terms?
Two people, one of mass 75kg and the other of mass 60kg, sit in a rowboat of mass 80 kg. With the boat initially at rest, two people, who have been sitting at opposite ends of the boat 3.2 m apart from each other, now exchange seats. How far and i..
Now consider this applet, where the two blocks have different masses. Plug the starting values into your formula from Part G, using 5 for mass of the red block and 10 for the magnitude of the acceleration of gravity.
Suppose two alpha particles were held together so they were just touching. Estimate the electrostatic repulsive force each would exert on the other
The cylindrical space station, 200 m in diameter rotates in order to give artificial gravity of 3.0 g for the occupants. How much time does it take, in seconds, to complete one revolution.
q1. a pet-store supply truck moves at 25ms north along a highway. inside a dog moves at 1.85ms at an angle of 35deg
A current of 23.0 mA is maintained in a single circular loop of 3.80 m circumference. Calculate the magnetic moment of the loop
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