In mathematics, the cosine function (cos) is a function that relates the interior angle of a triangle to the length of its sides. The cosine…
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No recent invention has changed modern human life nearly as much as the computer. Since their invention in 1939, digital computers have become a mainstay of…
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How many liters are in a gallon? While you may think the answer to this question should be a straightforward one, in practice, there are…
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A century is an interval of time 100 years in length. While technically a century can refer to any period of 100 years, most often…
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It is a well-known fact that all around the world, different countries use different kinds of money. Trying to buy a pint of beer in…
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How many weeks are in a year? A calendar year has 52 whole, complete weeks. To be more precise, there are 52.14285 weeks in a…
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Are you curious how you can make brown out of two common colors? Brown is a combination of three or more colors, so it can…
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Science is in the business of finding cause-effect relationships between things in the natural world—discovering how changes in one quantity cause changes in another. The quantities…
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