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Hello,

I have been having a debate with someone that is driving me insane...

Here is the problem

http://www.ra31v1.pwp.blueyonder.co.uk/water1.JPG

Lets say we have 20,000m^3 of water like the image above.

If we were to freeze a quarter of it. what will happen to the level of the water, eg, will it rise, drop or will it stay the same?

The information I have looked up states that on freezing water it expands by

9% and also that floating ice on water will be 89.5% underwater.

http://www.ra31v1.pwp.blueyonder.co.uk/water2.JPG

Here we have frozen a quarter which would then become....

http://www.ra31v1.pwp.blueyonder.co.uk/water3.JPG

with 89.5% underwater and 10.5% above the surface of the water.

so now I can say that 89.5% of 5450m^3 = 4877.75m^3 is under the surface of the water.

so now if you add the remaining 3 quarters of water 15,000m^3 to the frozen quarter thats underwater 4877.75m^3 you get:

15,000m^3 + 4877.75m^3 = 19877.75m^3 total

originally before freezing a quarter there was 20,000m^3, and now after freezing there is 19877.75m^3 so this must mean that the water level will drop slightly.

However, the person I am having a debate with seems to think differently, she believes that if you freeze a quarter like we have done the level of the water will not rise or fall, it will stay exactly the same.

PLEASE will someone clarify this.

Thanks very much

I have been having a debate with someone that is driving me insane...

Here is the problem

http://www.ra31v1.pwp.blueyonder.co.uk/water1.JPG

Lets say we have 20,000m^3 of water like the image above.

If we were to freeze a quarter of it. what will happen to the level of the water, eg, will it rise, drop or will it stay the same?

The information I have looked up states that on freezing water it expands by

9% and also that floating ice on water will be 89.5% underwater.

http://www.ra31v1.pwp.blueyonder.co.uk/water2.JPG

Here we have frozen a quarter which would then become....

http://www.ra31v1.pwp.blueyonder.co.uk/water3.JPG

with 89.5% underwater and 10.5% above the surface of the water.

so now I can say that 89.5% of 5450m^3 = 4877.75m^3 is under the surface of the water.

so now if you add the remaining 3 quarters of water 15,000m^3 to the frozen quarter thats underwater 4877.75m^3 you get:

15,000m^3 + 4877.75m^3 = 19877.75m^3 total

originally before freezing a quarter there was 20,000m^3, and now after freezing there is 19877.75m^3 so this must mean that the water level will drop slightly.

However, the person I am having a debate with seems to think differently, she believes that if you freeze a quarter like we have done the level of the water will not rise or fall, it will stay exactly the same.

PLEASE will someone clarify this.

Thanks very much

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