certain radioactive material is known to decay at a rate proportional o the amount present. If initially there are 100 milligrams of the naterial present and if after two years it is observed that 5% of the riginal mass has decayed, find (a) an expression for the mass at any me t and (b) the time necessary for the 10% of the original mass to ave decayed.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A certain radioactive material is known to decay at a rate propertional
to the amount present. If initially there are 100 milligrams of the
material present and if after two years it is observed that 5% of the
original mass has decayed, find (a) an expression for the mass at any
time t and (b) the time necessary for the 10% of the original mass to
have decayed.
Transcribed Image Text:A certain radioactive material is known to decay at a rate propertional to the amount present. If initially there are 100 milligrams of the material present and if after two years it is observed that 5% of the original mass has decayed, find (a) an expression for the mass at any time t and (b) the time necessary for the 10% of the original mass to have decayed.
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