Question
Lakes freeze in cold countries in winter, leaving the
water underneath at –Solution
Lake ice cover is seasonal and occurs where average daily temperature is below the freezing point. Once formed the lake ice thickens over the course of the winter as the temperature gets colder. The lakes thermal structure prepares for ice with 0 (zero) degrees Celsius water at the surface and denser 4 degrees Celsius at the bottom.
Which of the following is known as "Vitamin B1"?
At ________ the centigrade and Fahrenheit scales are equal.
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Identify the most abundant metal in the earth's crust.
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