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The refrigerator shown in Fig. P2.87 steadily receives a power input of 0.15 kW while rejecting energy by heat transfer to the surroundings at a rate of 0.6 kW. Determine the rate at which energy is removed by heat transfer from the refrigerated space, in kW, and the refrigerator's coefficient of performance.
A piece of copper at 320 degrees Celsius is dropped into 1.4 kg of water at 17 degrees Celsius. If the equilibrium temperature is degrees Celsius , what is the mass of the copper
The human eye is sensitive to orange light having a frequency of about 4.95 1014 Hz, What is the energy in joules of the photons associated with this light
The swimmer in the figure below propels himself forward by exerting a 142 N backward force on the water with his hand. He experiences a forward reaction force F of magnitude 142 N. Find the magnitude and direction of the torque exerted on the arm ..
The planet Saturn has a satellite, Calypso, which travels in an orbit of radius 2.950×108 m with a period of 1.89 days. Calculate the mass of Saturn from this information
A proton enters the region between the two plates shown in the figure moving in the x-direction with a speed v = 1.61 106 m/s. The potential of the top plate is Vt = 245 V, and the potential of the bottom plate is Vb = 0 V.
Two resistors A and B are 60,000 and 40,000 (omega sign) respectively and are in series across a constant power supply of 100V. What amount of current is flowing in each of the 3 resistors
An electric device, which heats water by immersing a resistance wire in the water, What is the resistance of the heater wire
two sinusoidal waves traveling in opposite directions interfere to produce a standing wave with the following wave
A long solenoid with 10.0 turns/cm and aradius of 7.00 cm carries a current of28.0 mA. A current of 5.00 A exists in a straight conductor located alongthe central axis of the solenoid.
A 5.0-um strand of DNA carries charge +e per nm of length. Treating it as a charged line, What is the electric field strength 21nm from the DNA, not near either end
A rugby player passes the ball 9.75 m across the field, where it is caught at the same height as it left his hand. How long did this pass take
An eyepiece of 3.0- cm focal length and an objective of 0.29-cm focal length are used in a standard microscope. What power should be marked on the eyepeice?
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