magicpuppydance
09.04.2021 •
Physics
Two radioactive materials X1 and X2 have decay constants 8λ and λ respectively. If initially they have the same number of nuclei, when will the ratio of the number of nuclei of X1 to that of X2 will be e-3.
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Ответ:
There are four main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are eight main blood groups.
Explanation:
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