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Mariana [72]
3 years ago
14

a radioactive element has a half-life of 30 days. calculate the mass of the element that remains after 20 days if 100g of the el

ement decays. Also, calculate the decay constant.
Physics
1 answer:
patriot [66]3 years ago
4 0

Explanation:

the answer is in the image above

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Explanation:

The given data is as follows.

            U_{a} = 5.4 \times 10^{-8} J

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Formula to calculate electric potential energy is as follows.

            U_{b} = U_{a} - W_{/text{a to b}}

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Thus, we can conclude that the electric potential energy of the pair of charges when the second charge is at point b is 7.3 \times 10^{-8} J.

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