The rubidium isotope 8737Rb, a emitter with a half-life 4.75 1010yr, of is used to
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The rubidium isotope 8737Rb, a β emitter with a half-life 4.75 × 1010yr, of is used to determine the age of rocks and fossils. Rocks containing fossils of ancient animals contain a ratio of 8737Sr to 8737Rb of 0.0260. Assuming that there was no 8738Sr present when the rocks were formed, estimate the age of these fossils.
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