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The drill bit of a variable-speed electric drill has a constant angular acceleration of 5.21 rad/s2. The initial angular speed of the bit is 5.12 rad/s. After 4.57 s,
(a) what angle has the bit turned through and
(b) what is the bit's angular speed?
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The electric field everywhere on the surface of a thin spherical shell of radius 0.780m is measured to be equal to 940 N/C and points radially toward the center of the sphere.
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One end of a 68-cm-long copper rod with a diameter of 2.4cm is kept at 480?C, and the other is immersed in water at 24?C. Calculate the heat conduction rate along the rod
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Two long parallel wires each with a mass per unit length of 25.10 g/m are supported in a horizontal plane by 2.5 cm long strings. Each wire carries the same current, I, causing the wires to repel each other so that the angle between supporting string..
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