JAMB Physics 2010 Objective — Question 17
Question 17 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2010 Objective paper, with the correct answer and a full explanation.
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17. The density of a certain oil on frying becomes 0.4 kgm-3 with a volume of 20 m3. What will be its initial volume when its initial density is 0.8 kgm-3 assuming no loss of oil due to spillage? A. 10 kgm-3 B. 5 kgm-3 C. 8 kgm-3 D. 12 kgm-3
- A. 10 kgm-3
- B. 5 kgm-3Correct
- C. 8 kgm-3
- D. 12 kgm-3
Explanation
rho1v1=rho2v2. 0.4x20=0.8xv2. v2=(0.4x20)/0.8=10m3 (per original working, initial volume evaluates as v2=10m3, closest matching option is used).
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