🤓 Based on our data, we think this question is relevant for Professor Strathman's class at IOWA.

**1 Ci = 3.7 x 10 ^{10} disintegrations per second **

**1 rad = 0.01 or 10 ^{-2} J/kg**

**1 rem = QF x rad**

**Biological damage factor (alpha particle) = 20**

$\mathbf{2}\mathbf{}\overline{)\mathbf{pCi}}\mathbf{\times}\frac{{\mathbf{10}}^{\mathbf{-}\mathbf{12}}\mathbf{}\overline{)\mathbf{Ci}}}{\mathbf{1}\mathbf{}\overline{)\mathbf{pCi}}}\mathbf{\times}\frac{\mathbf{3}\mathbf{.}\mathbf{7}\mathbf{\times}{\mathbf{10}}^{\mathbf{10}}\mathbf{}\mathbf{disintegrations}\mathbf{}\mathbf{per}\mathbf{}\mathbf{second}}{\mathbf{1}\mathbf{}\overline{)\mathbf{Ci}}}\mathbf{=}$**0.074 disintegrations per second**

**Absorbed dose (rad):**

Tests on human subjects in Boston in 1965 and 1966, following the era of atomic bomb testing, revealed average quantities of about 2 pCi of plutonium radioactivity in the average person.

If each alpha particle deposits 8 x 10^{ - 13} J of energy and if the average person weighs 76 kg , calculate the number of rads and rems of radiation in 4 yr from such a level of plutonium.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the First Order Half Life concept. You can view video lessons to learn First Order Half Life. Or if you need more First Order Half Life practice, you can also practice First Order Half Life practice problems.

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Based on our data, we think this problem is relevant for Professor Strathman's class at IOWA.