4)A large Mass mA = 2.50 kg travelling at 25.0 m/s crashes head-on into a smaller mass m which is originally at rest. The masses can slide without friction on the level surface. Afte mA reverses direction, recoiling with a speed of 5.00 m/s in the opposite direction. %3D

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.