2-The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. If 1 gram of this isotope is present initially, how long will it take for 90% of the lead to decay?

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Q: 12. A 4000 mg sample of bismuth decays to 500 mg in 18 minutes. What is its half-life?

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Q: Radium decomposes at a rate proportional to the quantity present. If at the end of 20 years…

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Q: m-48 has a half-life of about 16 days. Suppose that we have 21 grams of Vanadium-48. a) Find the…

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.