Quote:
Originally Posted by john70t
Protip from the news:
Take a cup of frozen water and leave a penny on top in the freezer.
If penny is halfway down, power was restored sometime afterwards. Some food might be still good.
If penny is at bottom, power was lost for a long time.
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I would strongly suggest that you freeze a cup of water, then set a coin on it at your desk.
See how long the coin is "halfway down".
I have not done this myself, but keep in mind water is a chemical oddball in that its solid form FLOATS on its liquid form.
So the solid water could melt to liquid water, sink below the solid water, and the coin would float on a bed of solid water over the liquid water.