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The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9,...

Physics
JAMB 1980
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
  • A. zinc
  • B. brass
  • C. copper
  • D. gold
  • E. silver
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Correct Answer: Option B
Explanation
R.D = \(\frac{\text {density of object}}{\text{density of water}}\)

= \(\frac{\frac{0.425}{50 10^-6}{1000}\)

= 8.5
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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts