Science

What is a space which is entirely devoid of matter called in science terms?

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Which parts of a nerve cell send out signals?
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How many dimes are equal to one pound in weight?
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Which of these is defined as "part of the electromagnetic spectrum that contains visible light"?
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Where are the male sperm cells formed in flowering plants?
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Which 5" telescope would have an optical tube with the shortest length?
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What is a storage device for electricity called?
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Where is the world’s most active volcano located?
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What branching nerve fibers receive messages?
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