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When the author attended high school some 60 years ago,

Chapter 35, Problem 90TAD

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QUESTION:

When the author attended high school some 60 years ago, his teacher showed a piece of uranium ore and measured its radioactivity with a Geiger counter. Would that reading for the same piece of ore be different today?

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QUESTION:

When the author attended high school some 60 years ago, his teacher showed a piece of uranium ore and measured its radioactivity with a Geiger counter. Would that reading for the same piece of ore be different today?

ANSWER:

Step 1 of 2

The half life of an element is determined by the radioactive decay of a material, which is a fixed value that does not change with time. The half life of C-14, for example, is 1500 years and is a constant value. It is independent of the material's quantity because the rate of radioactive decay is constant.

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