JAMB Physics 2020 Objective — Question 36
Question 36 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2020 Objective paper, with the correct answer and a full explanation.
Advertisement
36. The linear expansivity of brass is 2x10^-5°C^-1. If the volume of a piece of brass is 10cm3 at 0°C, what will be its volume at 100°C?
- A. A. 10.06cm3Correct
- B. B. 10.04cm3
- C. C. 10.02cm3
- D. D. 10.20cm3
Explanation
Cubic expansivity ≈ 3 x linear expansivity = 6x10^-5°C^-1. V2 = V1(1+3α∆θ) = 10(1+6x10^-5x100) = 10(1.006) = 10.06cm3.
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.