What are the uses of Archimedes principles in our daily life
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1. Submarine:
A submarine has a large ballast tank, which is used to control its position and depth from the surface of the sea.A submarine submerges by letting water into the ballast tank so that its weight becomes greater than the buoyant force.Conversely, it floats by reducing water in the ballast tank.-thus its weight is less than the buoyant force.A ship floats on the surface of the sea because the volume of water displaced by the ship is enough to have a weight equal to the weight of the ship.A ship is constructed in a way so that the shape is hollow, to make the overall density of the ship lesser than the sea water. Therefore, the buoyant force acting on the ship is large enough to support its weight.The density of sea water varies with location. The PLIMSOLL LINE marked on the body of the ship acts as a guideline to ensure that the ship is loaded within the safety limit.A ship submerge lower in fresh water as fresh water density is lesser than sea water. Ships will float higher in cold water as cold water has a relatively higher density than warm water.
2. Fishes:
Certain group of fishes uses Archimedes’ principles to go up and down the water.To go up to the surface, the fishes will fill its swim bladder (air sacs) with gases.The gases diffuse from its own body to the bladder and thus making its body lighter. This enables the fishes to go up.To go down, the fishes will empty their bladder, this increases its density and therefore the fish will sink.
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