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kogti [31]
3 years ago
8

Why are some isotopes used as tracers?

Physics
1 answer:
sineoko [7]3 years ago
6 0
<span>C. They decay at a predictable rate. IE carbon 14 decay to carbon 12 to understand how long ago something was alive.</span>
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sasho [114]
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The part of the electromagnetic spectrum usually used for communication is
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<h2>Answer:</h2>

The part of the electromagnetic spectrum usually used for communication is of  radio waves, infrared waves and microwaves.

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