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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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Given that

Velocity of missile (v) = 20 m/s ,

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