One method for determining the amount of com in early Native American diets is t

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One method for determining the amount of com in early Native American diets is the stable isotope ratio analysis (SIRA) technique. As com photosynthesizes, it concentrates the isotope carbon-13, whereas most other plants concentrate carbon-12. Overreliance on corn consumption can then be correlated with certain diseases, because corn lacks the essential amino acid lysine. Archaeologists use the mass spectrometer to separate the 12 C and 13 C isotopes in samples of human remains. Suppose you use a velocity selector to obtain singly ionized (missing one electron) atoms of speed 8.20km/s and want to bend them within a uniform magnetic field in a semicircle of diameter 27.0cm for the 12 C. The measured masses of these isotopes are 1.99 times 10-26kg (12C) and 2.16 times 10-26kg (13C). What strength of magnetic field is required? What is the diameter of the 13 C semicircle? What is the separation of the 12 C and 13 C ions at the detector at the end of the semicircle? Is the distance found in part C large enough to be easily observed?

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hope this helps. https://docs.google.com/viewer?a=v&q=cache:KnIs-VCteS0J:vant.kipt.kharkov.ua/ARTICLE/VANT_2009_5/article_2009_5_57.pdf+&hl=en&gl=in&pid=bl&srcid=ADGEESggekK4HYUmXf-hkB26wAUsSh_Gi-8IuiwRrX9B2AzTiZu0tA3ITqfmESxh-3U2FJ6ACPFrYCo7D9J-AJ2_14Va_QSGE_OOrdChX5SJ2vb33__7Q53DS4amC9vO9yYlDBsf5vYB&sig=AHIEtbTGcZKtjQuDzfMXoFusi1lb6esrdw

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