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2014-07-30T07:12:52+07:00
Aktivitasnya pangkat negatif?

T₁/₂ = 30,8 menit = 1848 sekon

A = 7,56 . 10⁻¹¹ Bq

T₁/₂ = (ln 2) / λ
λ = (ln 2) / T₁/₂
λ = 0,693 / 1848
λ = 3,75 . 10⁻⁴

A = λ N
N = A / λ
N = (7,56 . 10⁻¹¹) / (3,75 . 10⁻⁴)
N = 2,016 . 10⁻⁸
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