mg FN In the example shown, if the track radius is 7 meters, what is the velocity of the mass? 30° The velocity is zero (since the force diagram is closed) Need to know the mass of the car to obtain a numerical answer 629 m/s O 3956 m/s O 251 m/s O NOTA

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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.