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Q. How fast must a centrifuge rotate if a particle 8.9 cm from the axis of rotation is to experience an acceleration of 400000 g 's?

Q. A 4.25 bullet traveling horizontally with a velocity of magnitude 375 is fired into a wooden block with mass 1.10 , initially at rest on a level frictionless surface. The bullet passes through the block and emerges with its speed reduced to 110 .

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