Hi everybody. I'm taking non-calculus physics at NCSU. There is a tricky homework question that I'm unable to solve. Here it is. My main problem is that I don't know where to start. Any advice would be greatly appreciated. Also, if anybody knows of some web links that explain RC and complex DC currents and how to calculate voltage, current, etc... on them, I would appreciate that link. Here we go: --------------- A singly charged heavy ion following a circular path in a uniform magnetic field of magnitude 0.053 T is observed to complete five revolutions in 1.58 ms. Calculate the mass of the ion. ----------------- Shouldn't the centripetal force equal the magnetic force, so: qvB = ((m)(v)(v))/r and then I could solve for m? My problem is that I don't know what "singly charged heavy ion" means in terms of the charge. Does that give me the charge? There's no explanation of this term in the book. Thanks for any help!