Exercise 4: Perform the following operations and express your answers with the correct number of significant figures: 1) ½ (270 kg)(16.4 m/s)? = 2) (213 m)(65.3 m) - (175 m)(44.5 m)= 3) A rectangle is measured to have a length of 54.7 m and a width of 20 m. What is its area?

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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.