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11
votes
3answers
492 views

Time dilation and waiting between meat and milk

Suppose Ploni eats some meat. He then gets in a spaceship and accelerates to some significant percentage of the speed of light for a short trip into outer space, and then returns home. At the time ...
10
votes
3answers
240 views

Why do siddurim and Shulchan Oruch OC start with Shacharis?

Why do siddurim and Shulchan Oruch OC start with the morning? Since the day starts with night, they should start with Maariv as does the mishnah.
9
votes
3answers
123 views

Why does Wednesday's shir shel yom include part of the next perek?

The Shir Shel Yom is (usually) a chapter of Tehillim said at the end of davening, unique to each day. That applies for every day except Wednesday. In some (many) customs, Wednesday's song is Tehillim ...
8
votes
2answers
2k views

Until what time in the morning may you eat on a fast day?

On fast days that begin in the morning, (Asara B'Teves, Taanis Esther, Shiva Asar B'Tamuz, Tzom Gedalya) if you intend to eat when you awake, until what time may you eat in the morning? Does it depend ...
8
votes
1answer
207 views

How did Jacob manage to have 12 children in 7 years?

Did Leah manage to have 6 sons and 1 daughter in the space of 7 years or was it over a longer period of time? In general it seems difficult to fit all of Ya'akov's children into a 7 year period. ...
7
votes
2answers
232 views

Is it true that it is 'Hiddur Mitzvah' to have the Hanukkah lights stay lit for longer?

Does it make a difference if the Hanukkah lights are lit for an hour or an hour and a half? Is it more of a 'Hiddur Mitzvah'?
7
votes
4answers
130 views

Why strong wind when splitting the sea?

The verses describing the splitting of the Yam Suf (Reed Sea) say a strong wind blew overnight before the sea split. To me, this implies a gradual process of moving a great deal of water. On the ...
7
votes
3answers
93 views

Melachah on Shabbath - after Shabbath

If Melachah was done on Shabbath, can the product of that Melachah be enjoyed after Shabbath, and if so, under what criteria (does it depend on how long after Shabbath, or on the need, or something ...
7
votes
0answers
201 views

Chatzi LaHashem

I've been having this discussion with my friends and family about the Halacha of dividing Yom Tov into Chatzi LaHashem (half of the day devoted to prayer and learning) and Chatzi Lachem (half of the ...
6
votes
2answers
145 views

Within what time frame does one have to give maaser on a large sum?

If someone suddenly has a large sum of money from a lottery or inheritance or gift, how much time does one have to disperse maaser money from that?
6
votes
4answers
332 views

In an average shul, how long before sunset does a combined weekday Mincha/Maariv service start?

Many shuls worldwide run combined weekday Mincha/Maariv services. How long before sunset do these services tend to start? Please specify a range, measured in "number of minutes". Also, please cite ...
6
votes
2answers
101 views

How long does soil need to last?

If you move a tree with its soil, it's considered replanted (so the rules of orla kick in) unless it can live off of the soil you're moving it with. (Source.) Clearly "if it can live" doesn't mean "if ...
6
votes
3answers
121 views

Blatant foreshadowing in the Torah

Genesis 13:10 has the following verse: ויישא-לוט את-עיניו, וירא את-כל-כיכר הירדן, כי כולה, משקה--לפני שחת יהוה, את-סדום ואת-עמורה, כגן-יהוה כארץ מצריים, בואכה צוער Translation of bold: ...
5
votes
1answer
115 views

Saying slichos at any time but “ashmores haboker”, should we take out references to the early morning time so we are not “lying”?

Many of the Slichos refer to the early morning time: "Ashmores Haboker", which is clearly not applicable to those who say late slichos (say at 8 AM) or who say it early at night (say at 10 PM, let's ...
5
votes
3answers
376 views

Is there a time limit for Borei Nefashos and Beracha Me'en Shalosh?

It seems that there's a 72-minute period after eating in which one must bentch. Does this also apply for Borei Nefashos and Beracha Me'en Shalosh?
4
votes
2answers
167 views

Shabbat with time dilation in space

I know there is some discussion in space/planets.. How would you keep shabbos in space? The Rabbi I asked this shabbat pretty much said the same thing; and you go by Jerusalem time when in doubt. ...
4
votes
1answer
107 views

Blessings on Birthdays

There is apparently a practice among contemporary Jews of giving out blessings on one's birthday. Is there any source for this in the Jewish tradition?
4
votes
2answers
175 views

Why are Pidyon HaBen ceremonies done towards evening?

Most Brissim are done in the morning, as it is mentioned that "Zerizim Makdimim L'Mitzvos". Why is this not applicable to a Pidyon Haben ceremony? If it is applicable, then why have I observed that ...
3
votes
0answers
53 views

Passover Seder for the infirm. Leniencies?

These questions have already been asked of a Rav. The object of asking them here is to be better informed to understand the sources used by and the answers given by the Rav. [1] I hope to make ...
3
votes
2answers
139 views

Shalom alecha rebbi (u'mori)

What is the significance of the time it takes to say Shalom Alecha Rebbi (U'mori)?
3
votes
4answers
407 views

Rishonim/Achronim time period differentiation

When was the end of the Rishonim time period and the start of the achronim time period? Who, what, why, and how did this come about? What caused this abrupt change in deemed mental and halachot ...
3
votes
1answer
85 views

How long did the showdown with Paro last?

Recently my torah-study group was discussing the events of Parshat Sh'mot, and someone claimed that people could only gather straw for bricks in the fall (I don't know if that's true) and the exodus ...
3
votes
3answers
166 views

Does a Late Bris Necessitate Teffilin?

When one makes a Bris after Shacharis, he wears Tefilin. If a Bris is made later on in the day, does he wear Tefilin? Why or why not? And if he does, does it require a second Bracha?
3
votes
2answers
127 views

Daf Yomi Scheduling for Shabbos, Yom Tov, and Sundays

With the twelfth Siyum HaShas behind us, I was wondering what is the best way for a person to maintain their Daf Yomi schedule on Shabbos, Yom Tov, and Sundays. Is it best to learn at a different time ...
3
votes
2answers
139 views

(When) should skipped parts of davening be made up?

If someone skips parts of shacharit in order to say shemoneh esrei with the congregation, (when) should the skipped paragraphs be made up?
2
votes
1answer
56 views

What is the deadline for yibbum?

If a man dies without children his brother is expected to marry his widow. He's not required to; he could instead perform chalitzah and then the woman is free to marry somebody else. While his ...
2
votes
1answer
110 views

“If you have time, say this”

I have seen in many siddurim, mainly in korbonos, the phrase "if you have time, add this parsha". How do you know if you have time? It seems obvious that if adding it would make you miss zman ...
2
votes
1answer
130 views

If you've missed Zeman Kriyas Shema, what should you do?

Suppose a fellow realizes at 9:16AM that the Gra Zeman Kriyas Shema was at 9:14 and he never said Kriyas Shema yet. Is there any gain by saying it immediately even though it is past the later Zeman ...
2
votes
1answer
153 views

Mesilat Yesharim - how much time per day for zehirut/watchfulness

The Mesilat Yesharim brings down zehirut (watchfulness) as one of the first steps to master. Zehirut in essence means working on cleaning oneself up from all bad behavior through analyzing one's ...
2
votes
0answers
131 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, ...
2
votes
2answers
102 views

Proper day and time for a Shloshim Seuda

per Chabad.Org: "Traditionally, families gather on the eve of the Shloshim to share support, recite prayers and Psalms, and to give charity in the merit of the deceased. Many will also make a Siyum, ...
1
vote
5answers
355 views

What makes prayer take so long?

I have noticed that some people take a lot longer to pray than others. I was wondering what exactly adds to this length? I do understand it's probably thinking of the meaning of the words etc. but ...
1
vote
1answer
100 views

Should we really say kaddish for twelve months for a parent?

Is Kaddish really twelve months for a parent? When I said Kaddish for my father fifty years ago I read in the prayer book at the Chevra Kaddisha Bnai Jacob in Montreal that it should only be for ...
1
vote
1answer
110 views

Bracha on Tzitzit

If one takes a nap and has the intent to put tzitzit back on, does he need to make a new bracha when he does so? Is it considered hesach hadaas (loss of concentration)? Or does his intent obviate ...
1
vote
1answer
42 views

What is the motivation behind the obligated number of times different workers are required to fulfill their conjugal rights obligations?

In Hilchot Ishut the Rambam gives different requirements to men to fulfill their conjugal rights obligations (http://www.chabad.org/library/article_cdo/aid/952888/jewish/Ishut-Chapter-Fourteen.htm). ...
1
vote
1answer
48 views

Why did Pharaoh's officers wait for three whole days before returning to inform him? Rashi Shemos 14 (5)

The Torah tells us Shemos 14 (5) It was reported to Pharaoh that the people had fled; and Pharaoh and his servants had a change of heart toward the people, and they said, What is this that we ...
-2
votes
1answer
143 views

Is one permitted to report inflated driving hours?

In the United States, all applicants for a driver license (and permit) must have driven a certain number of hours, which varies per state. In some states the number of required hours is very high, ...