(Boneh-בונה Ep. 10) (#730) Working with items that are made to go in and out on a constant basis.

Does It Make a Difference How One Removes Something Growing from the Body (e.g., Cutting vs. Biting Nails, Cutting vs. Plucking Hair)?;

What Are Some of the Reasons Why Electrical Appliances Are Not Allowed to Be Turned On (on Shabbos or on Yom Tov)?;

Is One Allowed to Salt Multiple Vegetables on a Spoon Right Before Eating Them?;