Question
Scientists are currently working on developing thought-activated electronics. They would be able to do things like turning a light on and off just by wishing it that way. Suppose one lived in (or was visiting) a house that had a thought activated light. Such thoughts are difficult to control. What would one do on Shabbat?

Question
I always thought you cannot do things to prepare for after Shabbat. And you cannot carry anything within an eruv that you plan to use solely after Shabbat. But I’ve faced a common scenario where I go over someone’s house for a Shabbat meal and they offer me leftovers and other food to take home that realistically there is zero chance I will eat during Shabbat. They get offended if I say no. When I explain the laws of the eruv, which are printed explicitly in the eruv guidebook everyone has, they act like it doesn’t apply in this situation. Many people get upset that I act like a know-it-all when all I am trying to do is follow Jewish law. Even some rabbis I go over sometimes offer me food to take home. This appears to be widespread practice in our community as many view the eruv as a free-for-all. What should I do about this?

Question
The shul I attend has some members who are not fully observant who drive there. One of them is an elderly gentleman who walks with a cane. This past Shabbos, he dropped some of his change on the floor (which is muktzeh). He was determined to retrieve it all himself. But I thought it would be a hazard for him to bend down and pick it all up, and I did it for him. Did I do the right thing? No one else seemed to notice.

Question
The area I just moved to has no eruv. I moved into a gated community in the area. The entire development is surrounded by an uninterrupted fence. It has one entrance for cars and two for pedestrians. The car entrance/exit has a set of gates that slide open whenever an authorized car approaches and closes once the car passes through, forming a complete seal. The pedestrian entrances are metal gate-style doors that open with a key provided to each tenant. Can this be considered an eruv that would permit carrying within the development?

Question
In Halacha, Jews are forbidden from having animals do prohibited melachot on Shabbat. My question is, is there any issur of Lifnei iver with animals, or no, since animals don’t have the same free will humans do? As an example, putting an electronic color on a dog, which the dog could activate on Shabbat, before Shabbat would be setting the animal up to cause melacha on Shabbat, so would it be Lifnei iver?

Question
Does Friday have any special holiness above earlier days of the week because it is closer to Shabbat? Does the day need to be treated with any extra respect? Are there any activities in modern times that Jewish law actually either requires or forbids us to do on Erev Shabbat in honor of Shabbat?

Question
I will soon be traveling to Saudi Arabia for business and spending 3 weeks there. I don’t know what to expect. What is some advice you have for coping as a Jew in Saudi Arabia?