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A screw multiplies effort through the principle of the lever. The screw part of the fastener is actually a small lever that allows the screw to bite and dig into other materials.

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โˆ™ 2014-10-07 01:40:49
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Who is known as the first African American scientist

Which scientist used mathematical knowledge to calculate the exact measurement of the meter

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Which scientist used his knowledge of astronomy to publish a popular almanac

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Q: How does a screw multiply effort?
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