A child rides a pony on a circular track whoseradius is 5.25 m. (a) Find the distance traveled and the displacement after the child has gone halfway around the track. (b) Doesthe distance traveled increase, decrease, or stay the same whenthe child completes one circuit of the track? Explain. (c) Does thedisplacement increase, decrease, or stay the same when the childcompletes one circuit of the track? Explain. (d) Find the distanceand displacement after a complete circuit of the track.

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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.