What Kinds of Feathers Are Used for Stuffing Pillows, Quilts and Upholstery? Feathers used for stuffing pillows, quilts and upholstery are judged on the basis of...
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It is hard to walk on ice because its smooth, frozen surface causes you to slip. Ice is slippery not only because it is smooth but also because it melts under the...
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What Makes a Ship Float? A small steel ball dropped into water sinks immediately. A ship weighs thousands of tons, yet it floats on the ocean’s surface. A ship...
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When you toss a ball into the air, it comes down because it is pulled to earth by gravity. Gravity is a force that pulls all things on the earth toward the...
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What Are Scales and How Do They Work? Scales are valuable tools that help us keep track of our weight. In addition to doctors’ offices, you’ll also find...
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