ch28-p031 - 31. (a) We solve for B from m = B2qx2/8V (see...

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31. (a) We solve for B from m = B 2 qx 2 /8 V (see Sample Problem 28-3): B Vm qx = 8 2 . We evaluate this expression using x = 2.00 m: B = ×× × = 8 100 10 392 10 320 10 200 0 495 32 5 19 2 Vk g Cm T ch c h b g . .. (b) Let N be the number of ions that are separated by the machine per unit time. The current is i = qN and the mass that is separated per unit time is M = mN , where m is the mass of a single ion. M has the value M = × 100 10 3600 278 10 6 8 kg s kg s Since N = M / m we have i qM m ==
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