MDCAT Physics MCQ #2827

The decay constant of a radioactive substance is 0.1 s^-1. What is its half-life?

MDCAT Physics MCQ #2827

  1. Question 1

    Q1. The decay constant of a radioactive substance is 0.1 s^-1. What is its half-life?

    • A) 6.93 s
    • B) 0.693 s
    • C) 10 s
    • D) 1 s

    Answer: 6.93 s

    Explanation: Half-life = ln(2)/decay constant = 0.693/0.1 = 6.93 s.