What makes " שכר שבת בהבלעה" (shabbos earnings included with weekday earnings) different from regular "shabbos earnings".
Understanding the concept of "מצוה" in S'char shabbos.
loose double knots;
What Are Some of the Reasons Why Electrical Appliances Are Not Allowed to Be Turned On (on Shabbos or on Yom Tov)?;