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Suppose that the throttling valve in the refrigerator of the previous problem is replaced with a small turbine-generator in which the fluid expands adiabatically, doing work that contributes to powering the compressor. Will this change affect the COP of the refrigerator? If so, by how much? Why do you suppose real refrigerators use a throttle instead of a turbine?
A 3.0 kg cube on a spring (k=280 N/m) oscillates in simple harmonic motion. The cube has a speed of 0.55 m/s when it is 0.020 m from the equilibrium position. (a) find the amplitude of motion. (b) determine the cubes maximum velocity.
A particle moves horizontally in uniform circular motion, over a horizontal xy plane, What are the coordinates of the center of the circular path
A roller coaster has 8 cars, each of mass of 95.0 kg. The ride begins 47.5 m above the ground. What is the speed of the train
A pair of hedge trimmers are 45 cm long from the pivot to the end of the handles. how much force is applied to the branch
Your friend has a near point of 112 cm, and she wears contact lenses that have a focal length of 34.6 cm. How close can she hold a magazine and still read it clearly
What is the force on the 1 nC charge at the bottom. how far will it skid if it is traveling at 120 km/h when its brakes lock.
The angle of incidence at a solid/liquid boundary is 86.2°, andthe index of refraction of the solid is n = 1.61.(a) What must be the index of refraction of theliquid such that the direction of the light entering the liquid isnot changed?
Find the magnetic field produced at the point (0,b,0). What are their individual directions? 2) A current I flows clockwise in a square loop of side w located with corners at (0,0,0), (0,w,0), (w,w,0), and (w,0,0) (in cartesian) . Find the magne..
A $100 cart is moving down an inclined plane at 1.30 m.s, The cart collides with a stationary object and rebounds with a speed of 0.970 m/s. What was the change in momentum
Two people wish to push a big beer freezer weighing 2000 N up a ramp inclined at an angle of 37.0o with the horizontal. what average force does it exert on the heavy object
A 4.60 kilogram ball, moving to the right (positive direction) at a velocity of +1.60 m/s on a frictionless table, Determine the final velocity of the 4.6 kg ball if the collision is elastic
A shift of one fringe in the Michelson-Morley experiment corresponds to a change in the round-trip travel time along one arm of the interferometer by one period of vibration of light, what velocity through the ether would be deduced frame a shift o..
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