JAMB - Physics (1980 - No. 24)
The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10-6m3m of water is made of
zinc
brass
copper
gold
silver
Explanation
R.D = \(\frac{\text {density of object}}{\text{density of water}}\)
= \(\frac{\frac{0.425}{50 10^-6}{1000}\)
= 8.5
= \(\frac{\frac{0.425}{50 10^-6}{1000}\)
= 8.5
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