i would suggedt gerneral questions. you can simply edit yourpost and move it over there

1. Közösség
2. Study Group
3. Calculating speed

that doesn't make any sense. You don't measure speed in time. You measure speed in distance/time. What I think you mean is that the eye sees everything that is visible in a single spot for at least...

1. Közösség
2. Study Group
3. Calculating speed