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Four small disks A, B, C, and D can slide freely on a frictionless horizontal surface. Disks B, C, and D are connected by light rods and are at rest in the position shown when disk B is struck squarely by disk A which is moving to the right with a velocity v0 = (12 m/s)i. The masses of the disks are mA = mB = mC = 7.5 kg, and mD = 15 kg. Knowing that the velocities of the disks immediately after the impact are vA = vB = (2.5 m/s)i, vC = vC i, and vD = vD i, determine
(a) The speeds vC and vD,
(b) The fraction of the initial kinetic energy of the system which is dissipated during thecollision.
A sound wave enters from a warm room at 23°C to chilly room at 2°C. What is the difference in the wavelength of the wave between two rooms
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A solenoid is made by wrapping a wire so that it makes a solenoid (coil) having 500 turns of diameter 8.00 cm and length 40.0 cm. Find the inductance of this solenoid
blinking lights in a christmas tree use an rc circuit with a time constant of 5.00 seconds. if the capacitor has
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