Calculate the average atomic mass for Strontium (Sr) if it has three isotopes. The three isotopes are Strontium-86 whlch is 10.1 % abundant, Strontium-87 which is 7.2 % abundant, and Strontium-88 which is 82.7 % abundant? Show all work

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)