A block of wood is so loaded that it just floats in water at room temperature. what hange will occur in the state of flotation if a) salt is added to water b)water is heated?. Give reason.
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BUOYANCYCONCEPT
The principle of buoyancy holds that the buoyant or lifting force of an object submerged in a fluid is equal to the weight of the fluid it has displaced. The concept is also known as Archimedes's principle, after the Greek mathematician, physicist, and inventor Archimedes (c. 287-212 b.c.), who discovered it. Applications of Archimedes's principle can be seen across a wide vertical spectrum: from objects deep beneath the oceans to those floating on its surface, and from the surface to the upper limits of the stratosphere and beyond.
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A wooden block just floats on water.
a] If salt is added the :
---> The density of water increases so the the upthrust on block of wood increases and hence the block rises up till the weight of water is displaced by submerged part of block is equal to the weight of the block.
b] On heating the water , its density decreases , so upthrust on block decreases and the block sinks more in water.
a] If salt is added the :
---> The density of water increases so the the upthrust on block of wood increases and hence the block rises up till the weight of water is displaced by submerged part of block is equal to the weight of the block.
b] On heating the water , its density decreases , so upthrust on block decreases and the block sinks more in water.
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