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Q: Which of the following is a radioisotope used to date rock formations? A. carbon-14 B. uranium-235 C. cobalt-60 D. carbon-12
A: A. carbon-14
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Asked 5/23/2012 1:48:15 PM
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what helps explain the trend in life expectancy in America? A. Multinational corporations have increased. B. Health care technology has improved. C. Satellites broadcast television around the world. D. More immigrants enter the country every year.
Weegy: D. More immigrants enter the country every year. (More)
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Expert Answered
Updated 8/26/2014 7:02:15 AM
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Health care technology has improved. This helps explain the trend in life expectancy in America.
Added 8/26/2014 7:02:14 AM
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what does sublimation mean
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Expert Answered
Updated 9/15/2014 6:23:30 AM
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Sublimation in chemistry is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase.
Added 9/15/2014 5:42:24 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [9/15/2014 6:23:34 AM]
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