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प्रश्न
State the principle of floatation. What can you say about the average density of a ship floating on water?
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उत्तर
Principle of floatation states that a floatating body displaces an amount of fluid equal to its own weight.
Ship is designed in such a manner that it encloses large quantity of air in air tight bags and in rooms and corridors which makes the average density of ship less than that of water.
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संबंधित प्रश्न
A block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if
(a) Some salt is added to water, (b) Water is heated?
Give reasons.
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` .
Why is the floating ice less submerged in brine than in water?
A rubber ball floats in water with 2/7 of its volume above the surface of the water. Calculate the average relative density of the rubber ball.
Name an instrument based on this principle. State two uses of the instrument that you describe.
Explain the following:
A hydrometer is made heavy near the bottom.
Explain the following:
Icebergs floating in the sea are very dangerous for ships.
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Reason: The body will experience no net downward force in that case.
Why do petroleum-based products float on the surface of the water?
Describe the purpose, principle, and working of the Lactometer.
