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honey lemon honey lemon
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5 years ago
If a radioactive isotope were injected into your bloodstream, how many half-lives would you have to wait before the amount of this isotope in your body is (1/

1} its original amount?
A) 1      B) 2      C) 3      D) 4      E) 5
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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notrealnotreal
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#1
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5 years ago
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honey lemon Author
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5 years ago
Brilliant ツ
lierac00
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Yesterday
Thank you, thank you, thank you!
annabananerz
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2 hours ago
This site is awesome
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