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प्रश्न
Why does a ship make of iron not sink in water, while an iron nail sinks in it?
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उत्तर
Density of iron is more than density of water, therefore weight of iron nail is more than wt. of water displaced by it and nail sinks. While shape of iron ship is made in such a way that it displaces more weight of water than its own weight. Secondly, the ship is hollow and the empty space contains air which makes the average density of ship less than that of water and hence ship floats on water.
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संबंधित प्रश्न
A body of volume V and density ρs , floats with volume v inside a liquid of density ρL. Show that `"v"/V = ρ_s/ρ_L` .
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(i) The mass of hydrogen in the balloon,
(ii) The mass of hydrogen and balloon,
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(iv) The mass of air displaced by balloon and
(v) The mass of equipment using the law of floatation.
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Reason: The body will experience no net downward force in that case.
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