Science

What does a ruler measure?

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In what year did Einstein submit his paper containing the correct field equations of general relativity?
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What organelle packages and helps in secretion of substances within the cell?
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What is a steep-sided circular depression commonly known as?
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What is NOT considered part of the Person Centered Theory in psychology?
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The definition of "process of removing salts from water using a membrane" best fits which science term?
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What is the opening of a lens, which controls the amount of light?
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Who is credited with identifying HIV as the cause of AIDS?
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What type of circulatory system pumps blood into cavities instead of through vessels?
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