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Two identical spheres are charged to the same amount q and hang from the ceiling, at the same point, by strings. Because of the electrical force between them, the strings form an angle of theta to the vertical.
a. What is the equation for the tension in the strings?
b. What is the mass of the sphere?
A uniform brass disk of radius R and mass M with a moment of inertia I about its cylindrical axis of symmetry is at a temperature T = 37 °C. Determine the fractional change in its moment of inertia
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The sound intensity level at a rock concert is 114 dB, while that at a jazz fest is 84.5 dB. Find the ratio of the sound intensity at the rock concert to that at the jazz fest
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A piano string having a mass per unit length equal to 4.50 x 10-3 kg/m is under a tension of 1,250 N. Find the speed with which a wave travels on this string
A coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 2.00 cm and 1000 turns/meter. The current in the solenoid changes as I = (5.00 A) sin(120t). Find the induced emf in the 15-turn coil as a function of time.
In a hydroelectric installation, a turbine delivers 1890 hp to a generator, which in turn converts 37.9% of the mechanical energy into electrical energy. Under these conditions,
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