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July 26, 2023
July 10, 2023
What is any picture of an object made with a mirror or lens called?
July 26, 2023
July 10, 2023
What was originally defined as one 10-millionth of the distance from the equator to the North Pole?
July 25, 2023
July 10, 2023
What does a seismologist study?
July 25, 2023
July 10, 2023
What type of material allows electrons to flow freely?
July 24, 2023
July 10, 2023
How many orbits did U.S. astronaut Gordon Cooper complete in an Atlas rocket in 1963?
01
02
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24
25
26
27
28
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42
43
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