Prepared By: -
LUBNA RIZWAN
(MD GENIUS STUDIO)
K.V. IIM LUCKNOW
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Puri first sink into the hot oil. After puffing it starts floating on oil as it displaces the amount of water as its weight.
LAW OF ARCHEMEDES
The law of Archimedes belongs to floating and sinking. The object which displace the amount of water as its weight will float onto the water and the object which cannot displace the amount of water as its weight will sink into the water.
FLOAT OR SINK
Cup-shaped Aluminium foil will float on water
Ball of Aluminium foil will sink into the water
Piece of Aluminium foil will also float on water
FLOAT OR SINK
Empty bottle with its lid closed will float on water.
Bottle half filled with water will also float on water
Because they can displace the amount of water as their weight.
FLOAT OR SINK
Bottle filled with water will sink into the water, because it can not displace the amount of water as its weight.
Ice cubes float on water because it can displace the amount of water as its weight.
FLOAT OR SINK
Ceramic bowl or steel plate will float on water because it can displace the amount of water as its weight.
Pin or nail will sink into the water, because it can not displace the amount of water as its weight.
FLOAT OR SINK
Soap case will float on water because it can displace the amount of water as its weight.
Alone soap will sink into the water, because it can not displace the amount of water as its weight.
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SALT HELPS IN FLOATING
Lemon and Egg floated in salty water because after adding salt, water becomes sticker and heavy
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DEAD-SEA
Dead Sea is the saltiest sea in the world situated between Jordan and Israel. It is as salty as we mix 300 gm of salt in 1 litre of water. People cannot be drowning in this sea because salt changes the density of water.
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SOLUBLE AND INSOLUBLE IN WATER
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SOLUBLE AND INSOLUBLE IN WATER
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INSOLUBLE IN WATER
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MAKING OF SALT
The sea water is collected in shallow beds dug in the sand. Water is allowed to dry in the sun. After the water dries the salt remains on the ground.
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DANDI MARCH
This incident took place in 1930, before India became independent. For many years the British had made a law that did not allow people to make salt themselves. They had also put a heavy tax on salt. By this law people could not make salt even for use at home. “How can anybody live without salt?” Gandhiji said, “How can a law not allow us to use freely what nature has given!” Gandhiji, with several other people, went on a yatra (long walk) from Ahmedabad to the Dandi seashore in Gujarat, to protest against this law.
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