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Q. A 5g lead bullet travelling at 370-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 whilst the other half is transmitted to the tree, what is the increase in temperature of bullet?

Q. A sinusoidal wave travels along a string. The time for a particular point to move from maximum displacement to zero is 0.10 s. What are the (1) period and (2) frequency? (3) The wavelength is 3.00 m; what is the wave speed?

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