Science

What is defined as the average distance from the Earth to the Sun?

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Energy return of a radar signal after it has hit the target best fits which science term?
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Which bridge has the longest span in the U.S.?
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In which constellation was the first double star observed?
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What was the first sound-recording device called?
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What metal is used for most electrical wire and cable?
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Scott and Worden were crewmembers on which Apollo mission?
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Optics is the study of what?
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Which of the following is not a constellation?
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