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Q. A grinding wheel 0.45 in diam rotates at 2900. What is acceleration of a point on the edge of the grinding wheel?

Q. A 4g lead bullet travelling at 390 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the enhancement in temperature of the bullet?

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