The shortest day of the year is December 21 in the northern hemisphere and our coldest months are December, January, and February.
Why are our coldest months not November, December, and January?
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it’s like this….
the earth is like a battery. It sucks up all the heat it’s exposed to and releases it slowly over time (for the region). So, the entire summer it soaks up the heat, and releases it slowly, so december isn’t the coldest time of the year when it’s still releasing hte heat… it’s after december when it runs out of the stored heat.
same for summer. the longest day is in June, but the hottest time is generally august
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they’ve actually been able to demonstrated this and apply it to technology. Some people are actually planning on using this behavior to create cheap and sustainable batteries on a large scale. They have huge silo’s of sand, with focusing lenses, to store sunlight generated heat, then they use the heat being released as a power source.
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