Find the conjugate of each of the following:

Given: $z=\sqrt{2}$

The above can be re - written as

$z=\sqrt{2}+0 i$

Here, the imaginary part is zero

So, the conjugate of $z=\sqrt{2}+0 i$ is

$\bar{z}=\sqrt{2}-0 i$

Or $\bar{z}=\sqrt{2}$