Advertisements
Advertisements
Question
An iron nail sinks in the water while an iron ship floats on water. Explain the reason.
Advertisements
Solution
An iron nail sinks in water because density of iron is more than the density of water, so the weight of the nail is more than the upthrust of water on it.
On the other hand, ships are also made of iron, but they do not sink. This is because the ship is hollow and the empty space in it contains air, which makes its average density less than that of water. Therefore, even with a small portion of ship submerged in water, the weight of water displaced by the submerged part of ship becomes equal to the total weight of ship and it floats.
APPEARS IN
RELATED QUESTIONS
State the principle of floatation.
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` .
A piece of ice floating in a glass of water melts, but the level of water in the glass does not change.
Give reasons.
Hint: Ice contracts on melting.
Explain the following :
Icebergs floating in sea are dangerous for ships.
For a floating body, its weight W and upthrust FB on it are related as :
Why does a ship make of iron not sink in water, while an iron nail sinks in it?
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.
Explain the following:
Icebergs floating in the sea are very dangerous for ships.
If you put one ice cube in a glass of water and another in a glass of alcohol, what would you observe? Explain your observations.
Hydrometer is based on the principle of ______.
