How long does a knot have to be tied to be considered a "קשר של קימא". (Knot of permanence).
Is There a Difference Between Shearing, Cutting, Pulling Out, etc., When It Comes to Hair or Wool?;
tearing off the strip of plastic on the sides of plastic containers
Is One Allowed to Carry (With an Eruv) a Sweater to Shul for After Shabbos? Taking the Key When You Could Hide It;