For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1. If the original amount of strontium-90 in a sample is 38.9 mg, how much strontium-90 remains after 28.4 years have passed?
For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1. If the original amount of strontium-90 in a sample is 38.9 mg, how much strontium-90 remains after 28.4 years have passed?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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Radioactive decay can be described by the following equation
ln A = ln A0 - kt
where A0 is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance.
For the radioactive isotope strontium-90, k is 2.47 x 10-2 years -1.
If the original amount of strontium-90 in a sample is 38.9 mg, how much strontium-90 remains after 28.4 years have passed?
_____ mg.
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