Science

What is the opening of a lens, which controls the amount of light?

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A meter is equivalent to how many millimeters?
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What is a long balloon filled with helium generally called?
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The definition of "clouds composed of small particles, mostly ice crystals" best fits which science term?
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What is the result when you reduce a ketone?
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How many jointed legs does an adult insect possess?
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What unit is force measured in?
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What are produced in the anther of a flower?
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What metal is used to make cans?
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