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A sample of radioactive element has a mass of 10 gram at an instant t=0. The approximate mass of this element in the sample after two mean lives is
Options
(a) 2.50 gram
(b) 3.70 gram
(c) 6.30 gram
(d) 1.35 gram
Correct Answer:
1.35 gram
Explanation:
M = M₀ e-λt
Since, t = 2/λ, we get
M = 10 × e-λ × (2/λ) = 10 e⁻² = 1.35 gram
Related Questions: - Which of the following are mechanical waves?
- If a solid sphere of mass 1 kg and radius 0.1 m rolls without slipping at a uniform
- A man measures time period of a pendulum(T) in stationary lift. If the lift moves upwards
- The circular motion of a particle with constant speed is
- The potential energy of a long spring when stretched by 2 cm is U.
Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following are mechanical waves?
- If a solid sphere of mass 1 kg and radius 0.1 m rolls without slipping at a uniform
- A man measures time period of a pendulum(T) in stationary lift. If the lift moves upwards
- The circular motion of a particle with constant speed is
- The potential energy of a long spring when stretched by 2 cm is U.
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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