A block of wood is loaded that it just float in a water at room temperature.
What change will occur in the state of flotation if
Some salt is added to water. .
Water is heated.
Water is cooled at 4 C.
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On adding some salt to water, the density of water increases, so upthrust on block of wood increases and hence the block rises up till the weight of salty water displaced by the submerged part of block becomes equal to the weight of block.
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