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A charged particle of charge e and mass ...

A charged particle of charge e and mass m is moving in an electric field `vecE` and magnetic field `vecB`. Constant dimensionless quantities and quantities of dimention `[T]^-1`.

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A dimensionless quantity cannot be constructed with e, m, `vecE` and `vecB`. A quantity of dimensions `[T^-1]=omega=[(eB)/(m)]`
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