physics

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An ionized helium atom has a mass of 6.6*10^-27kg and a speed of 4.4*10^5 m/s. The atom moves perpendicular to a 0.75-T magnetic field on a circular path of radius 0.012m. Determine whether the charge of the ionized helium atom is +e or +2e.

Can anyone please give me some ideas to do it? Thanks!

  • physics -

    Centripetal force=mv^2/r that has to equal Bqv, right? solve for q

  • physics -

    i solved it the way you mentioned. the only thing i did was that i changed M from kg to g

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