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These atoms will decay as the rock ages, and by measuring the ratio of radioactive isotopes within the rock, scientists can figure out how long it has been around. In 1913, geologist Arthur Holmes published “the Age of the Earth,” the first major effort to date the planet using radiometric dating.
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Read this it will help: https://nationalhumanitiescenter.org/ows/seminars/progressive/bookertweb/wellsbookertwashingtoncritics.pdf
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that the wind changes every 3hr.
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hope it helps
Answer: The sale of US Government Defense Savings Bonds, or “war bonds,” helped the United States government raise billions of dollars for the war effort and combat inflation. Bonds were sold at a discount, and were ultimately cashed in when they reached maturity after the war.
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