Science
Which song was used to wake up the first Space Shuttle crew in orbit?
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What is the repeated sound when sound waves bounce off other objects called?
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Ian Shelton, who discovered Supernova 1987A, while observing in Chile, was working for what university?
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When a dog repeats a learned behavior and gets a reward, what process is shown?
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What would you use to measure the mass difference between two like objects?
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