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A material is found to have a tenth-thickness of 2.3 cm for 1.25-MeV gamma rays. (a) What is the linear attenuation coecient for this material? (b) What is the half-thickness? (c) What is the mean-free-path length for 1.25 MeV photons in this material.
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Calculate the time rate of change dHB/dt of angular momentum about point B when the particle passes the bottom of the guide at C.
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