6 votes

Biometric screening on Shabbat

Even if the "listening" circuit is always on, the "action" circuit is turned off until activated. When anything comes near the sensor, it immediately springs into action, searching ...
ElonMusk's user avatar
  • 391
3 votes
Accepted

Corn cutting on Shabbat

Refer to the Sefer Shabbos Kehilchasa, Vol 2 p.321-22 הפוסקים נחלקו האם מותר להסיר הגרגירים מהקלח - ויש אסרו לעשות זאת, גם כאשר נעשה לאלתר בסמוך לאכילה. אלא שכל זה כשמוציא גרגירים ממקום חיבורים, אבל ...
Dov's user avatar
  • 30.3k
3 votes

Torah as a bar metzra

The Torah is not only a gift. It's also referred to as an inheritance (מורשה קהלת יעקב, Deut. 33:4) and as a sale (מכרתי לכם תורתי, Shmos Rabbah 33:1). So the issue of bar metzra would still apply to ...
Meir's user avatar
  • 7,781
2 votes

If you are lost in the desert do you make havdalah first?

First off, his assumption that it is Sunday does not mean the previous day was shabbat. So my initial thought would be that he wouldn't say havdala being that everything is a safek and this havdala ...
Shababnik's user avatar
  • 1,155
2 votes
Accepted

Cultivating hydroponics on Shabbat

Star-K address this concept here Nurturing plants is one of the 39 melachos, prohibited categories of work on Shabbos and Yom Tov. Therefore, on those days the seeds may not be placed in their base, ...
Dov's user avatar
  • 30.3k
2 votes
Accepted

Wiping spills on Shabbat

Cleaning a spill on Shabbos involves the following two actions (see here): Wetting the cloth with the spill and Moving around the soaked cloth. Wetting a cloth on Shabbos touches upon a possible ...
Shmuel's user avatar
  • 8,854
1 vote

Hot chocolate on Shabbat

Although the original psak deals with soup-powder, I think it would be no different with cocoa-powder. Refer to the answer here on Dinonline.org: it would be permitted to put instant soup mix into a ...
Shmuel's user avatar
  • 8,854
1 vote
Accepted

Plastic wrap on Shabbat

As the article Gershon Gold in the comment section linked says, it is not allowed. See here. I was reading the article on my phone, before writing this article, and saw that it was already linked in ...
Shmuel's user avatar
  • 8,854
1 vote

Hot tub on Shabbat

Our Sages prohibited bathing one’s entire body – or the majority of it – in hot water1 [on Shabbos], whether the hot water was in a container or [collected] in the ground,2 even if [the water] was ...
Dude's user avatar
  • 4,313
1 vote
Accepted

Bug spray on Shabbat

Dinonline quotes two sources (Shmiras Shabbos Khilchoso 25-4,6, Orchos Shabbos 14-28) and says that it is not allowed to spray it directly unto the insects, because we cannot kill insects on Shabbos. ...
Shmuel's user avatar
  • 8,854
1 vote

Parshas Behalosecha: The inverted nuns demarcating two punishments

Regarding the first punishment, the Rabbeinu Bahya (Bamidbar 10:33) explains this Gemara to mean that as soon as they left the "environment of Sinai", the people deviated from following G-d. ...
Shmuel's user avatar
  • 8,854
1 vote
Accepted

Torah as a bar metzra

The Sfas Emes that you mentioned in the question addresses this. Here is the background of the piece: בלקיחה ניתנה לו יכול יתן דמים ת"ל מתנות כו'. כי מרע"ה הי' מוכן לקבל התורה בבחי' לקיחה… ...
Chatzkel's user avatar
  • 10.6k
1 vote

Why is the Leviathan scared of the Kilbit?

In the context of your quote from tractate Shabbat, each of the 5 types of dread pertain to something much smaller and weaker afflicting and even overpowering something much more powerful. In the case ...
Yaacov Deane's user avatar
  • 14.3k
1 vote

Did Elisha get his tefillin back?

The Ateres Yehoshua (רב יהושע קרלנשטיין) offers a unique perspective on the Sugya: The wings never turned back to Tefilin because Hashem doesn't perform miracles without purpose. He also offers an ...
user6781's user avatar
  • 3,210

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