4) Two blocks of mass m,= 3 kg and m,= 7 kg are connected by a massless string over a pulley with radius r = 0.25 m and mass M = 9 kg. There aren't friction forces in inclined planes. The directions of acceleration a and angular acceleration a are given in Figure. (a) Draw free-body diagram. (b) Find the linear acceleration.

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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.