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Power outages are not uncommon even in our modern and technological XXI century. Often a temporary blackout did not affect the quality of life, but it also happens the other way. Imagine you are weaned on a business trip for a week, and in your absence in the apartment several times We turned off the light for a long time, and products for your arrival time to be spoiled, but the smell is not yet appeared.
It is easy to imagine what will happen after a meal. This is just one example, and there may be many. But the Americans have come up with a very interesting, and most importantly a simple way how you can check whether the electricity is turned off in your absence.
So, all that is useful to you, it's a small container filled with water, freezer, and a coin of any denomination. To start a container of liquid must be completely frozen. After that, the formed piece of ice, place a coin and again send in the freezer.
As soon as you will need to know whether the electricity was turned off, just look in the freezer and take a look at the state of his creation. If the coin is as before - so all is well, and electricity worked properly. If the coin "drowned" by a thin layer of ice, so the light was turned off, but not for long. Well, if the coin is frozen at the bottom - it is better to update the set of products in the refrigerator.
Home life hacking experts argue that there is, at least,
8 very useful ways to use the freezer for other purposes.
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A source: https://novate.ru/blogs/200318/45380/