Both exists, and salt can have both. Fluor in the salt is quite specific to Germany and a few other countries though.

Rocky linux is definitely for desktop too. It was designed as a successor of Centos, which was widely used in medium and big companies. We currently use Rocky 8 where I work. It works fine.

Something is wrong with your distance formula by a factor of 4 (you should have D=1/2 * V_0^2 / a) . Not that it changes anything in your conclusions.

Say the word “giraffe”. Don’t pronounce the ra. Wow. That simple.