If $\overline{x}+\overline{y}=\overline{x}+\overline{z}$ then $\overline{y}=\_\_\_\_\_\_$

$\left(1,2,3\right) \times \left(2,4,6\right)=\_\_\_\_\_\_$

$\left|2i-4j+4k\right|=\_\_\_\_\_\_$

If $\overline{x}=\left(3,2,1\right)$ and $\overline{y}=\left(-1,3,2\right)$ then $\overline{x}-\overline{y}=\_\_\_\_\_\_$

If $\overline{x}=\left(1,0,0\right)$ and $\overline{y}=\left(0,0,1\right)$ then $\overline{x}.\overline{y}=\_\_\_\_\_\_$

If $\overline{x}=i+3j-2k$ and $\overline{y}=4i-2j-k$ than angle between $\overline{x}$ and $\overline{y}$ is $\_\_\_\_\_\_$

If $\overline{x} =\left(2,3,-1\right)$ and $\overline{y} =\left(a,-1,3\right)$ are perpendicular to each other then $a=\_\_\_\_\_\_$

if $\overline{x}=\left(2,1,1\right)$ and $\overline{y}=\left(1,-1,2\right)$ then Direction cosines of $\overline{x}-2\overline{y}=\_\_\_\_\_\_$

If $\overline{x}=\left(1,0,0\right)$ and $\overline{y}=\left(0,0,1\right)$ then vector perpendicular to $\overline{x}$ and $\overline{y}$ both is $\_\_\_\_\_\_$

A particle moves from a point  2i-j-3k to the point  4i-3j+7k under the effect of force  3i+2j+3k and 2i+j-3k . The work done by the force is $\_\_\_\_\_\_$ units.