A sample of animal bone unearthed at an archaeological site, Ask an Expert

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Q1. James is twirling a rock around a horizontal circle on the end of a string. The accompanying figure is the top view (motion is counter clockwise).

If the speed is constant what is the acceleration at point A?

Q2. A sample of animal bone unearthed at an archaeological site is found to hold 173 grams of carbon and the decay rate of 14-C in the sample is measured to be 8.10 Bq. How old is the bone?

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