Problem 31.104
A sample of ore containing radioactive strontium 90 38Sr has an activity of 6.0 105 Bq. The atomic mass of strontium is 89.908 u, and its half-life is 29.1 yr. How many grams of strontium are in the sample?
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Chapter 5 – Work and Energy Work o Forces do work o Work is ascalar quantity o The work done by a force on an objec that moves it along the xis W=F (Δx) o Work on an object gives it rgy Work is a pe of energy transfe done with orces It transfers ergy into/out of a system Pushing or ulling All energy has to be accounted for, it has to be conserved PAPER NOTES 1 o If force and displacement point in the same direction W=F (Δx)∨W=F(d) o If the force is at an angle W= (
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Chapter 31, Problem 31.104 is Solved
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