How to calculate error propagation Videos

No reasoning is given for considering the uncertainty as +/- 0.7 cm for the case of the half = 10 cm. The +/- 0.7 cm is not intuitive, and seems lacking logic. There is something behind which is not said. What about working on 1 cm, or even 0.1 cm, instead of 20 cm, will its uncertainty be considered in both cases as +/- 0.7 cm. Is "adding" uncertainty to become +/- 0.7 cm logic?. Where is the "general role" that everybody may apply? This adds "ambiguity" to the whole issue rather than removing it as assumed. No one can accept uncertainty of +/- 0.7 cm on a piece of 1 cm in length , for not to talk about the uncertainty of +/- 0.7 cm on a piece of 0.1 cm in length, otherwise we are in a world of "science fiction" rather than in a real "physical world". Roles, whatever they are, cannot drop the "simple intuitive logic". What does "this uncertainty" mean after all this strange story?

THANK YOU SOOOOOOO much for this video. I can't explain enough how helpful it was.

This was very helpful, and I feel prepared for my test. Thanks :)

Such a clear way of explaining it. Thank you! (PS: nice handwriting)

Your wife is a lucky lady.

thank you so much! its amazing how much detail you go into. No other person on youtube does it as good as you.