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A pulley in the form of a uniform disk has a rope hanging over it.The circumference of the pullet is 1.2m and the pulley's mass is2.2 kg. The rope is 8m long and has a mass of 4.8 kg. When the difference in heights between the two end of the rope is 0.6m the system is at rest.
1- What is the angular Speed of the pulley when the difference in height between the two ends of the rope is7.2m?2- Obtain an expression for the angular momentum of the systemas a function of time while neither end of the rope is above the center of the pulley. (There is no slippage between the rope andthe wheel)
A certain superconducting magnet in the form of a solenoid of length 0.30 m can produce a magnetic field of 13.0 T in its core when its coils carry a current of 105 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find o..
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