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JAMB Physics 2013 Paper

Question : 7

Total: 43

Solution:

Concept:

For a floating object, the fraction of its volume immersed equals the ratio of the object’s density to the liquid’s density.

Explanation:

Fraction immersed

= \frac{\rho_{\text{cork}}}{\rho_{\text{liquid}}}

= \frac{0.25 \times 10^{3}}{1.25 \times 10^{3}}

= \frac{0.25}{1.25} = 0.2

Therefore,

20\%

of the cork’s volume is below the liquid surface.

Answer:

0.2

(Option C).

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