Given 1.00 grams of each of the following radioisotopes, ca-37, u-238, p-32 and rn-222,which would have the least remaining original isotopes after 100 years? 1) ca-37 2) u-238 3) p-32 4) rn-222

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a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.