Multiple choice

Pieces of iron do not float on water because

  1. mass of the water displaced is less than that of iron

  2. mass of the water displaced is more than that of iron

  3. mass of the water displaced is equal to iron

  4. it displaces no water

  5. none of these
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A Correct answer
Explanation

According to Archimedes' principle, an object sinks if the weight of the water it displaces is less than the weight of the object itself. Iron is denser than water, so it displaces a mass of water less than its own mass.

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