Answer : In radioactive decay, the half-life is the length of time after which there is a 50% chance that an atom will have undergone nuclear decay. It varies depending on the atom type and isotope, and is usually determined experimentally.
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Answer:
C
Explanation:
0.20-0.10=0.10
because the population was decreased
Answer:
A
Explanation:
because when sun shines on water, it turns into heat and evaporate
