How long does a knot have to be tied to be considered a "קשר של קימא". (Knot of permanence).
When a Fly Is Between a Window and a Screen, Am I Allowed to Close the Window?;
Giving a gift. (Understanding how that concept works).
Digital Watches on Shabbos. If Someone Left Something in Their Car on Shabbos. Using a Timer on a Hot Plate on Shabbos;