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Test # 142


1.
find odd man out

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Idiom of the Day

for safekeeping
in order to keep something safe
I put the valuable stamps in the bank for safekeeping.
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  • Simple Science

    The Unit of Heat

    Temperature and Heat:
    It is necessary to have a unit of heat just as we have a unit of length, or a unit of mass, or a unit of time. One unit of heat is called a calorie, and is the amount of heat which will change the temperature of 1 gram of water 1 C. It is the amount of heat given out by 1 gram of water when its temperature falls 1 C., or the amount of heat absorbed by 1 gram of water when its temperature rises 1 C. If 400 grams of water are heated from 0 to 5 C., the amount of heat which has entered the water is equivalent to 5 400 or 2000 calories; if 200 grams of water cool from 25 to 20 C., the heat given out by the water is equivalent to 5 200 or 1000 calories.


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