Understanding the type of knots that are allowed to be opened on Shabbos.
What are some of the halachas of "kevashim/shlokos" (various foods). Part 1.
Does One Have to Use a Utensil (כלי) or Just Using One's Hands Is Enough for the Melacha;
Is One Allowed to Carry (With an Eruv) a Sweater to Shul for After Shabbos? Taking the Key When You Could Hide It;