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Q. A 2 g lead (cp = 128 J/kg C) bullet traveling at 325 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 increase in temperature of the bullet?

Q. Two identical metal spheres and are connected by a plastic rod. Both are initially neutral. 6.0×10^12 electrons are added to sphere , then the connecting rod is removed.

Afterward, what is the charge of?

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