Question $2$: A charged ion $($charge $=3$e$)$ with velocity $\backslash (6\mathrm{.}9\backslash$times $10^6\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash )$ moves in a circular path of diameter $60\mathrm{.}0$ cm in a magnetic field of $0\mathrm{.}80$ T in a mass spectrometer. What is the mass of this ion? $\backslash (\backslash$left$($e$=1\mathrm{.}60\backslash$times $10^\{-19\}\backslash$mathrm$\{$C$\}\backslash$right$)\backslash )$

Answer: $\backslash [\backslash$boxed$\backslash \{16\mathrm{.}7\backslash$times $10^\backslash \{-27\backslash \}\backslash ,\backslash$mathrm$\backslash \{$kg$\backslash \}\backslash \}\backslash ]$