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Thursday, 02 April 2026
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Why does a piece of cork float on water?

Why does a piece of cork float on water?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A There is no upthrust on it when completely immersed in water
  • B The upthrust on it when completely immersed in water is greater than its weight in air
  • C The upthrust on it when completely immersed in water is less than its weight in air
  • D Its specific gravity is greater than that of water
  • E Its specific gravity is the same as that of water
Correct Answer: Option C
Explanation:
It floats because it weighs more than amount of water it would have to push out of the glass if it sank. This means, its weight in air is less than its upthrust.

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