Water Reservoir
August 13, 2009 by admin
Filed under More Backpacks
How does a ceramic butter dish with a water reservoir beneath it keep butter cooler than one without?
We have a ceramic butter dish that has a reservoir underneath it and if you keep water in the reservoir the butter stays cooler than butter kept of a similar dish without the reservoir. Why is that?
The water evaporates, cooling the remaining water and the dish.
This is similar to how sweating keeps you cool, evaporating water takes some heat with it.
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