JAMB Physics 2007 Objective — Question 10
Question 10 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.
Advertisement
A radioactive substance has a half-life of 20 days. What fraction of the original radioactive nuclei will remain after 80 days?
- A. 1/16Correct
- B. 1/8
- C. 1/4
- D. 1/32
Explanation
Number of half-lives = 80/20 = 4. Fraction remaining = (1/2)^4 = 1/16.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.