Advertisements
Advertisements
प्रश्न
What is a submarine? How can it be made to dive in water and come to the surface of water?
Advertisements
उत्तर
SUBMARINE: Submarine is a water-tight boat which can travel underwater like a ship. It is provided with water tanks. When the submarine is to dive, water is filled in water tanks, it is made heavier and average density of submarine becomes greater than the density of seawater and it sinks. To make the submarine rise to the surface of the water, water tanks are emptied. This makes the average density of submarine becomes less than the density of seawater and it rises to surface.
While a submarine is underwater soldiers can see the enemy activities through the periscope.
APPEARS IN
संबंधित प्रश्न
The density of a piece of brass will change by changing its size or shape.
A density bottle has a marking 25 ml on it. It means that:
Icebergs floating on sea water are dangerous for ships. Explain the reason.
Explain why it is easier to lift a stone under water than in air.
The density of alcohol is 600 kg m-3. Express it in g Cm-3.
A piece of wood of mass 150 g has a volume of 200 Cm3. Find the density of wood in C.GS. unit and S.I. unit.
Calculate the density of solid from the following data :
(a) Mass of solid = 72 g
(b) Initial volume of water in measuring cylinder = 24 ml
(c) Final volume of water when solid is completely immersed in water = 42 ml
The mass of an empty density bottle is 30 g, it is 75 g when filled completely with water and 65 g when filled completely with a liquid. Find density of liquid.
You are required to take out 200 ml of milk from a bucket full of milk. How will you do it?
The mass of 5 litre of water is 5 kg. Find the density of water in g cm-3.
