deletions | additions       diff --git a/Question.tex b/Question.tex  index 43800e7..6c491bf 100644  --- a/Question.tex  +++ b/Question.tex 
...
\newcommand{\units}[1]{{\renewcommand{\.}{\!\cdot\!}\rm\,#1}}  \newcommand{\sci}[1]{\times 10^{#1}}  \newcommand{\sub}[1]{_{\text{#1}}}  \newcommand{\textfrac}[2]{{\textstyle\frac{#1}{#2}}}  \newcommand{\half}{\textfrac{1}{2}}  \newcommand{\infinity}{\infty}  \newcommand{\degree}{\ensuremath{{}^{\circ}}}  \newcommand{\abs}[1]{\left| #1 \right|}  \section{Problem}   Conservation of momentum is a fundamental principle that governs all interactions in the universe. It states that in any closed system the combined momentum at any one point in time must equal the momentum at any other point in time. It follows then that our ball collider must have similar results, with the final momentums of the balls being equal to the initial momentum.