A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there are100 milligrams of the material present and if after two years it is observed that 5 percent of the original mass has decayed, find (a) an expression for the mass at any time t (b) the time necessary for 10 percent of the original mass to have decayed.
A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there are100 milligrams of the material present and if after two years it is observed that 5 percent of the original mass has decayed, find (a) an expression for the mass at any time t (b) the time necessary for 10 percent of the original mass to have decayed.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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A certain radioactive material is known to decay at a rate proportional to the amount
present. If initially there are100 milligrams of the material present and if after two years it
is observed that 5 percent of the original mass has decayed, find
(a) an expression for the mass at any time t
(b) the time necessary for 10 percent of the original mass to have decayed.
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