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Author Question: In a contest, two tractors pull two identical blocks of stone the same distance over identical ... (Read 6262 times) |
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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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The average office desk has 400 times more bacteria on it than a toilet.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.