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belka [17]
3 years ago
7

Cobalt-60 has a half life of 5.25 years. If you started with a 40 gram sample of pure cobalt-60, how many grams of cobalt-60 wou

ld remain after 10.5 years?
Physics
1 answer:
s2008m [1.1K]3 years ago
6 0

Answer:

10 grams

Explanation:

A = A₀ (½)^(t / T)

A = 40 (½)^(10.5 / 5.25)

A = 40 (½)^2

A = 40 · ¼

A = 10

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