4bf3d0f0@news.povray.org...
> Phil Cook v2 <phi### [at] nospamrocainfreeservecouk> wrote:
>> The water is 'sucked' in because the cooling air inside the beaker lowers
>> the pressure, but prior to that the air was hot and therefore should be 
>> at
>> a higher pressure and force the water out of the beaker. Why does water
>> out not equal water in?
>
>  The glass is put on the plate *after* the candle has been lit, so the air
> around the candle is already hot.

Even if not already hot, as air volume inflates, water level in the beaker 
reaches the edge of the glass and gets bubbling out.
Now there is less air in the beaker than before the beginning of the 
experiment !
As the surface of the plate is bigger than that of the beaker, when air gets 
colder and volume smaller, water can rise faster in the beaker than it 
lowers in the plate.
At equal temperature, volume is smaller than before because there is less 
air :)
Marc

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