Post Utme Unilag 2021 Physics Question 1

Practice objective / multiple choice question 1 from the 2021 Post Utme Unilag Physics examination.

Post Utme Unilag 2021 Physics Objective / Multiple Choice
Question 1 POST_UTME_UNILAG • 2021 • PHYSICS • objective

A radioactive sample of Δₗ emits Δₗπ particles with a half-life of 3.8 days. If 25% of the sample remains after 11.4 days, what is the decay cons\tant λ?

Answer Options

Correct Answer A. \( λ = 0.0183 , \text{day}^{-1} \)
B. \( λ = 0.0187 , \text{day}^{-1} \)
C. \( λ = 0.0191 , \text{day}^{-1} \)
D. \( λ = 0.0195 , \text{day}^{-1} \)
Correct Answer
A
Correct Option:
\( λ = 0.0183 , \text{day}^{-1} \)

About This Question

This is Post Utme Unilag 2021 Physics Question 1. It is one of the objective questions from the 2021 Post Utme Unilag Physics examination.

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