Physics

Physics, 12.10.2019 23:30, cyniakaofficial

Scientists believe earth is about how many billion years old

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Biology, 15.07.2019 12:30, princessa15266

Scientists estimate earth's age to be 4.6 billion years. samarium has a half-life of approximately 106 billion years. from the present date, approximately how many more years must pass before a sample of samarium that was created at the beginning of earth's history contains 50 percent of the original parent material? 1 billion 10 billion 100 billion 1,000 billion

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Chemistry, 22.07.2019 08:10, jksimmons2364

Scientists estimate earth's age to be 4.6 billion years. samarium has a half-life of approximately 106 billion years. from the present date, approximately how many more years must pass before a sample of samarium that was created at the beginning of earth's history contains 25 percent of the original parent material? 10 billion 26 billion 100 billion 206 billion

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Health, 19.09.2019 15:10, terryonsavage543

What do scientists estimate is the approximate age of e planet earth a. 660 million years b. 3.5 billion yeas c. 4.6 billion years d. 12.2 billion years

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Geography, 06.12.2019 03:31, mixcolin0002

Earth probably formed years ago, and the first life evolved as early as years ago.hint: because fossils of bacterial communities have been discovered that are 3.5 billion years old, it is reasonable to assume life originated around 3.9 billion years ago. a. 3.9 million years ago 2.0 billion years ago b. 10 billion years ago 4.5 billion years ago c. 4.5 billion years ago 3.9 billion years ago d. 6,000 years ago 6,000 years ago e. humans observed neither event, so there is no way to tell.

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