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Physics task about fish and water

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electronics_kumar

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fish and water?

let i am having a 2 glasses with full of water in both...now i am placing a fish which is alive in one glass and another dead fish in other glass...what will happen for both cases? whether water will come out or level of water will remain same....
 

klug

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Re: fish and water?

Firstly they will be equal, but after some time dead fish will swell up by gas and it will surface - level of water will arise.

By the way, level of water in glass with live fish will not be constant, as fish sometimes will change his volume to go up or down. Fish is making that by air bubble in her belly.
 

neils_arm_strong

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fish and water?

the level will remain constant no matter what.That is the level in both the glasse will be same.
 

claudiocamera

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fish and water?

This kind of question is really interisting, mainly because it is not acuratelly presented, the answers depends of a lot of variables, so, who dares give the answer, can be trapped by the question...why ? let's see...

1- What is the size of the fishes, do they both of them have the same size and weight?
2- Will water transbord when you put the fishes?
3- If the alive fish move enough, will the water in its glass get out the glass due its moviment ?
4-How long is the observation time of the experiment ?
5- if its zero you will have an answer, if its infinite and the alive fish has the everlasting life you will have another answer.
6 -If its long enough and you dont feed the alive fish, soon you will have two dead fishes.

The question will be more interesting if it turns out in proposing other milions variables to consider. Funny isn't it ?
 

wolfheart_2001

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Re: fish and water?

Both will be the same since both take some volume of water for their bodies....exactly like putting a dish in the midlle of stack or at the bottom of the stack, in both cases the upper dish will go up with one dish hight
 

jc_bock

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Re: fish and water?

Assuming that the fish are of the same volume, assuming the system is a closed one and therefore no H2O molecules evaporate, and assuming the dead fish does not start to decompose, then the level of water in the glass with the live fish will slowly but surely decrease because the fish processes oxygen into carbon dioxide.

Though some carbon dioxide molecules do get absorbed into the water, most are released into the air...
 

sidra

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Re: fish and water?

well lots of explanations here...well it is an interesting question and very less data is provided to solve it...if the dead fish swallows the water then the water lever in the glass of dead fish will be less...and if it takes air and swell then the level in the glass of dead fish will be more....well anyways there can be many explanations
 

hayrikarakuzu

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fish and water?

water level of dead fish will remain same. and other is to get low
 

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