A hydrologist models contaminant spread using vectors $\mathbfp = \beginpmatrix 4 \\ -1 \\ 3 \endpmatrix$ and $\mathbfq = \beginpmatrix 2 \\ 0 \\ -1 \endpmatrix$. Find the projection of $\mathbfp$ onto $\mathbfq$. - Portal da Acústica