Advertisements
Advertisements
प्रश्न
Explain the following:
Icebergs floating in the sea are very dangerous for ships.
Advertisements
उत्तर
Relative density of Ice is = 0.9 cm-3
Relative density of sea water is = 1 cm-3
(Density of ice / Density of sea water) = fraction submerged of iceberg
0.9/1 = fraction of iceberg submerged
The fraction of the iceberg submerged = 9/10.
Thus in colder countries where there are icebergs in oceans, only about 1/10 is seen above water and the remaining water 9/10 remains submerged. Hence, there is a danger of these icebergs to the ships sailing in these oceans.
APPEARS IN
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.
For a floating body, its weight W and upthrust FB on it are related as :
A body of weight W is floating in a liquid. Its apparent weight will be
A test tube loaded with lead shots, weighs 150 gf and floats upto the mark X in water. The test tube is then made to float in alcohol. It is found that 27 gf of lead shots have to be removed, so as to float it to level X. Find R.D. of alcohol.
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:
A hydrometer is made heavy near the bottom.
State the laws of flotation.
How do submarines sink and float in water?
