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Liquid Level

June 4th, 2010 admin No comments

Liquid Level

If an ice cube melts in water does the level of liquid rise ?

A glass of water containing a floating ice cube sits on a table. When the ice has completely melted, will the level of the water have increased, decreased or remained unchanged?

NO it Will not increase.

bcos ice submerged in water takes more space than if that submerged part of ice takes when it is water.
so on melting the ice of submerged part decrease the water level but the ice floating above the water level makes up for this volume and overall level of 'water' remains same.

this is a theoretical explanation only but the change in the level of water can be calculated using basic hydrostatics and it will give a 0 rise again!
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a great deal of people are saying that it will increase or decrease.some others are saying that it depends on amount of ice submerged.
referring to joe's explanation.its effect in glass and in sea will be same if we take in account only pure water.it will neither decrease in glass nor in sea.
and the -=Matt=-'s explanation that ice takes up more space than water so level will go down.but -=Matt=- might have forget that the deficiency of volume created by melted ice submerged in water is exactly made up by portion of ice floating above water level.

and the part submerged always has the weight equal to weight of water displaced by it so WHATEVER be the shape of ice and the source of water the compensation of portion of ice floating above water level will always be the same as the deficiency of volume created by melted ice submerged in water.

it can only be affected by impurities present in water.if the impurities make the density of water more than density of equal volume of pure ice than on melting water level will decrease and vice-versa.
I think that much explaination is enough to clear this confusion