MDCAT Physics MCQ #2866

A ¹³¹I sample has a half-life of 8 days. What is its decay constant λ? (ln 2 ≈ 0.693)

MDCAT Physics MCQ #2866

  1. Question 1

    Q1. A ¹³¹I sample has a half-life of 8 days. What is its decay constant λ? (ln 2 ≈ 0.693)

    • A) 0.0866 day⁻¹
    • B) 0.693 day⁻¹
    • C) 8 day⁻¹
    • D) 0.00693 day⁻¹

    Answer: 0.0866 day⁻¹

    Explanation: λ = ln 2 / half-life = 0.693 / 8 = 0.0866 day⁻¹. Option D divides by 100 instead of 8.