(Boneh-בונה Ep. 86) (#806) Is one allowed to ask somebody else to open the bottle cap for them.

putting down items on the ground in a slippery area. Raising and lowering a chair, fan, etc. Putting down sand in a slippery area;

Tearing Apart a Six-Pack of Leben, Yogurt, Ices, etc.

Understanding the Concept of Something That Was Attached to the Ground or a Tree Going into Shabbos and Then Became Detached on Shabbos (Muktzeh);