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Q. How fast (in rpm) must a centrifuge rotate if a particle 6.50 cm from the axis of rotation is to experience an acceleration of 125,000 g's?

Q. A long wire lying along the x-axis carries a current of 3.40 A in the +x direction. There is a uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along the cartesian coordinate axes') in units of Tesla. Calculate the y-component of the magnetic force acting on a segment of wire of length L = 20.5 cm.

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