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4
votes
2answers
144 views

Scheduling Email for 3AM and Gneivas Daas

Is is permitted to schedule an email for the wee hours of the night, like 3AM, to give the impression that you were working late? Is it significantly well known that there are services like ...
5
votes
0answers
286 views

Is it better not to wear a watch on Shabbat?

I know it is permissible to wear a watch on Shabbat, and I have already perused this question about the particulars of what kinds of watch features are and are not permitted (ignoring the issue of ...
6
votes
1answer
788 views

Is it forbidden to use a sand timer on shabbos?

Everyone I know seems to say that using a sand timer (hourglass) on shabbos is forbidden. The question is why? Is it because of sifting? Is there some other melacha involved? Is it actually forbidden?
3
votes
0answers
130 views

To know in advance when one is a niddah

The gemoro and shulchan aruch has much to say about 'vestos', way to find out in advance when one will be a niddah, which rarely work today. There are modern methods which do work: does one have to ...
15
votes
3answers
2k views

Brewing fresh coffee for Shabbos with a time clock

May one prepare coffee ingredients in a brewer such as this one on Friday and set the timer to brew the coffee for 8:00 Shabbos morning?
2
votes
0answers
145 views

Am I allowed to wear my Pebble Watch on Shabbat? [duplicate]

The Pebble is a smart watch that connects to a smart-phone via Bluetooth and can deliver messages to your wrist. Am I allowed to wear it on Shabbat if I disconnect it from my phone? Think of it, then, ...
5
votes
3answers
391 views

Would time travel be assur/mutar?

Inspired by this question which the author states is not a question of issur/heter. Assuming time travel is possible (to the future or past) is there any reason it should be assur?
11
votes
2answers
234 views

Referencing Iron before the Iron Age

A guest brought up this question at the shabbos table, and no one had an answer. In D'Varim 8:9 it says "...a land whose stones are iron...". The question this guest asked was: How is it that the ...
3
votes
1answer
1k views

Self-winding wristwatches on Shabbos

Can self-winding wristwatches be used on Shabbos?