Questions tagged [shiurim-measurements]
measurements relating to the performance of different Mitzvot
216
questions
10
votes
2
answers
492
views
What Bracha acharona on .5 kezayit of grapes eaten together with .5 kezayit of mezonot crackers?
What Bracha acharona on .5 kezayit of grapes eaten together with .5 kezayit of mezonot crackers?
Do you say al hamichya ve'al haetz or is it boreh nefashot since neither is a kezayit?
Please provide ...
- 13k
0
votes
1
answer
379
views
What is the the amount a person who feels weak on a fast day could eat or drink?
What is the the amount a person who feels weak on a fast day could eat or drink. How many ounces and how often?
- 11
4
votes
1
answer
397
views
(Tefach) Wide Gartel
Some use a very wide gartel. A friend of mine mentioned an inyan (Judaism-sourced idea) that the gartel should be wider than one tefach. Can someone source this inyan that the gartel should be (more ...
- 6,676
6
votes
1
answer
123
views
Menorah 20 Amos above ground level
One does not fulfill his or her obligation of lighting the menorah if it is 20 Amos above since it is not easily seen.
The Rambam in Hilchos Shabbas 17:15 writes that a beam over a mavoi with ...
- 41k
4
votes
1
answer
75
views
Do brachos on seeing have to be made within four amos?
Is there any source that says that in order to make a bracha for seeing e.g., a sage of Israel, a sage of the nations, or an unusual animal, one must be within four amos of the person/thing?
I found ...
- 14.3k
4
votes
2
answers
325
views
What was the volume of oil for one day's lighting of the Menorah?
Large jars for storing oil or wine were common in Judah. For 100’s of years, oil and wine were the commodities that were used to pay tribute and taxes. Many storage jars were standardized and may ...
- 131
7
votes
1
answer
110
views
How big can a chanukia get?
I recently saw this story about students at YU who lit up their dorm windows to turn the entire building into a giant chanukia (just the form, not a real one). That inspired a question:
Exactly how ...
- 23k
4
votes
1
answer
143
views
What is the shiur Hanaah?
How much Hanaah (physical benefit) must one have of things prohibited as an Issur Hanaah (things forbidden for benefit) like milk and meat, Kiley HaKerem (certain grape mixtures), or Avoda Zara (...
- 40.3k
4
votes
2
answers
151
views
What did they do for shiurim before modern measurements?
In recent centuries, authorities such as the Chazon Ish, Rabbi Chaim Na'eh, and Rabbi Moshe Feinstein ruled on the exact size of a tefach, ammah, kezayit, and other shiurim. What did people do before ...
- 8,253
3
votes
1
answer
161
views
Has there been a discussion of changing the maximum height in halacha?
In halacha certain things are considered invalid because the exceed the maximum height which people will notice, 20 amos (menorah, sukkah, korah). In modern times many (most?) people live in areas ...
user6641
4
votes
0
answers
76
views
What's the definition of "not now" for priority-of-b'racha purposes?
Orach Chayim 211 is about what food to recite a blessing over (that is, and eat) first when one wishes to eat two foods. It's clear that (except according to the Rambam cited in 211:2) one does not ...
- 73.7k
2
votes
2
answers
631
views
Measurements for the Bais HaMikdash -- can we do it with a computer?
Since everything is computerized now, when the Bais HaMikdash is rebuilt, will we use the computer to rebuild? I.E., the measurements for the offerings, the entire rebuilding, etc.?
13
votes
3
answers
1k
views
Is there a "5 second rule" for foods becoming non-Kosher?
OK so I don't actually mean a 5 second rule. But is there an amount of time that it takes for something hot that comes in contact with a non-Kosher utensil or surface to become not kosher? For ...
- 868
2
votes
1
answer
112
views
How much invalid material invalidates schach?
How much invalid material invalidates schach? (tefachim + inches preferred, but not required)
Would it make a difference if this material was in the middle of the roof, or on the side (=next to the ...
- 19k
5
votes
1
answer
1k
views
How much of a gap in schach is acceptable?
How large of a gap is allowed in a sukkah's schach (roof) without invalidating it? (in tefachim and inches/feet, if possible)
Would it make a difference if the gap was in the middle of the roof, or ...
- 19k
2
votes
1
answer
212
views
L'Hafrish Challah with Dough Made by Multiple Women?
I am wondering if small portions of dough, made by separate women in a challah baking class (thus each small portion would be owned by a single woman), can be combined to create the requisite amount ...
4
votes
0
answers
200
views
Must the entire decoration be within 4 t'fachim of the schach?
Inspired by Can too many decorations render a sukkah invalid?
If there is a big decoration hanging from the schach, is it OK as long as the top (part, or most of the decoration) is within 4 tefachim, ...
- 23k
4
votes
2
answers
746
views
How far does dofen akuma stretch?
After reading Is a covered sukkah wall counted as a wall? i had a followup question on the answer there. (I was actually going to ask that, and had even drawn up diagrams, only to find that it was ...
- 23k
1
vote
1
answer
189
views
How much produce becomes bikkurim (first fruits)?
How much produce becomes bikkurim (first fruits)?
Rambam says: Hilchos Bikkurim Chap 2
Halacha 19 How should one separate the first fruits? A person descends
to his field, sees a fig tree, a ...
- 47.2k
0
votes
1
answer
122
views
Washing Once or Twice
Someone told me that technically one needs to pour water on each hand only once since we use large quantities of water. Is there a halachic source for this?
I heard that the requirement to pour twice ...
- 6,847
2
votes
3
answers
490
views
The Chofetz Chaim's kiddush cup
I read somewhere (don't remember where) that the Chofetz Chaim used a kiddush cup that was a smaller shiur than he recommends to use in his Mishna Berurah.
Can anyone verify this and/or explain the ...
- 9,618
3
votes
1
answer
338
views
What beracha acharona when ikar less than kezayit?
If you have an ikar (main) and tofel (secondary) mixture where the ikar is less than a kizayit but the entire mixture is greater than a kizayit, do you still make a beracha acharona on the ikar?
Or ...
- 13k
2
votes
0
answers
46
views
Source for dying upon reaching a set number of words spoken [duplicate]
If I recall correctly, it says somewhere that we each have a predefined number of words to speak, after which we die. (The idea being that one should be careful not to speak unnecessarily.)
Assuming ...
- 6,676
2
votes
1
answer
286
views
How much Matzo must one eat on Pesach?
According to the OU, one must eat a minimum of "approximately 26 cubic centimeters" of Matza and Marror to fulfill his requirement (ie, a kezayis is 26 cm3). They also provide a chart, which states ...
- 10.5k
2
votes
2
answers
476
views
Where does the contemporary measurement of a Kezayit come from?
According to the Nodeh B'Yehuda and the Chazon Ish, in order to calculate the size of a kezayis (which apparently is based on the size of an egg), we must double the size of our contemporary eggs. (...
- 10.5k
1
vote
0
answers
155
views
the measurements of Noah's arc and the arc of the covenent
The volume of Noah's Ark is 450,000 cubic cubits. The volume of the Ark of the Covenant is 5.625. Noah's Ark was thus exactly 80,000 times larger than the Ark of the Covenant. Is it significant that ...
- 29
4
votes
1
answer
1k
views
How many Oreos in a kezayis?
For standard Oreo cookies, how many would be a kezayis by volume? I have heard maybe 2.5 or maybe 3.
- 431
7
votes
1
answer
161
views
How does one do Hagalah above 12,000 feet?
How does one do Hagalah above 12,000 feet, where water's boiling point falls below 190°F? Under normal circumstances, the water will not be Rochsim, and therefore unsuitable for Hagalah.
Using a ...
- 6,676
3
votes
1
answer
176
views
Soldier's Shovel
Is there a shiur for the item the soldier is obligated to carry in Devarim 23:14?
וְיָתֵד תִּהְיֶה לְךָ עַל אֲזֵנֶךָ וְהָיָה בְּשִׁבְתְּךָ חוּץ וְחָפַרְתָּה בָהּ וְשַׁבְתָּ וְכִסִּיתָ אֶת צֵאָתֶךָ
...
- 7,723
5
votes
2
answers
237
views
Kaddish yatom: what if a parent really *is* wicked?
I understand that a soul may be judged for a full 12 months after death but that we (generally) only say kaddish yatom for a parent for 11 months because the longest period is for the worst sinners ...
- 56.4k
8
votes
3
answers
360
views
Why are we required to light Chanukah lights only for about half an hour?
Since the miracle of the oil of Chanukah was that from one flask of oil they miraculously had enough oil for the menorah to burn all night for eight days, why did Chazal require us to light only for ...
user4523
6
votes
2
answers
452
views
challah bracha on separate dough balls
I understand a bracha on dough is made if the amount of flour is greater than a certain amount, sourced here.
I have a small food processor I use to knead the dough. I plan to make a bunch of dough ...
- 760
2
votes
0
answers
531
views
How is a ten tefachim wall hard to use?
The Gemara in Eiruvin 77a says that when a ten tefachim wall is between two courtyards, but is less than that to one courtyard (the floor of the courtyard is heigher), we give it to the one which is ...
- 40.3k
4
votes
1
answer
801
views
How much water do you need for Netilat Yadayim?
When washing your hands for Netilat Yadayim, how much water do you need?
- 41
3
votes
1
answer
164
views
Shiur for kiddush rabba mezonos
When we make kiddush rabba with mezonos before having a real meal with bread, is there a shiur for how much mezonos a person should eat in order for it to be yotzei kiddush? Does it matter whether the ...
user3318
2
votes
1
answer
278
views
3 Pesukim minimum per Aliyah
Why is it that each aliyah for Krias Hatorah has to be 3 pesukim at minimum? I know that the minimum for an entire krias Hatorah on a weekday is 10 pesukim (with the exception of Purim being 9 pesukim)...
- 371
5
votes
1
answer
258
views
How long does it take to become a kofer?
If a person for whatever reason momentarily has a thought which denies God, but then afterwards reaffirms his belief in Hashem, is that an act of kefira? Does a momentary lapse in belief constitute a ...
1
vote
1
answer
754
views
Which shita are those wearing extra long tallit katan following?
Some rabbonim are wearing really long and large talith katan. For example Rav Shmuel Auerbach shlita (picture below).
Rav Elyashiv ztl used to wear a very long one too.
Which shita are they ...
- 1,153
4
votes
1
answer
124
views
Is there a legal minimum on the amount of soil needed to make a suitable grave?
This is not being asked for any pragmatic need. I had the thought about people living off of planets.
Without getting into the issue of whether a burial can take place anywhere beside Earth, I ...
- 269
3
votes
1
answer
50
views
Is there a concept of giving a fatter sacrifice?
Is there a concept of giving a fatter sacrifice as opposed to a smaller one? I believe the Torah says there are different levels of sacrifices depending on your wealth (e.g. a cow vs. a bird vs. flour,...
- 998
3
votes
1
answer
702
views
Which is the height considered 3 tefachim for not "praying in height"? (30cm?)
Recently we had to make a synagogue for one day at a hall, and we used a scaffold for the Shaliach tzibbur to be well heard by all the public.
The Scaffold was 1m x 1.5m, and I don't remember the ...
- 161
7
votes
1
answer
281
views
Aruch Hashulchan's moon-distance estimate
Aruch Hashulchan (1829–1908), Orach Chayim 397:1, says that a מיל is the same as a Russian верста (verst) or 500 сажен (sazhen), which comes to 1066.8 meters. In 426:2, he says the distance to the ...
- 73.7k
1
vote
1
answer
299
views
Satmar Rebbe's opinion on Mechitza
Where could I find the opinion of the Satmar Rebbe (Rav Yoel) zt'l on the height and laws pertaining to the Mechitzah?
- 4,647
9
votes
1
answer
318
views
What's the Shiur of Mashehu?
Certain issurim (forbidden things) can become batel (halachically nullified) if they were unintentionally mixed in heter (permitted things). In order for this to happen, the heter must outnumber the ...
- 21k
4
votes
2
answers
157
views
Can we really estimate halachic distances?
A mishna on Eiruvin 41b tells of a ship that was coming into harbor at dusk coming into Shabbat. Since Shabbat had already begun when the ship docked, those on board asked R. Gamaliel if they could ...
- 56.4k
4
votes
3
answers
483
views
Shiur of "Miut Hamatzui"
A "miut hamatzui" is a phrased used to express a case where because of a small concern that something exists, or might happened, or does happen that the halacha is affected by this. An example is if ...
- 16k
0
votes
1
answer
98
views
Challah dough that loses its amount
A theoretical question:
Someone was making a dough and in the process a large piece fell out from the mixture onto the floor. They had made exactly the right amount in order to take challah with a ...
- 16k
4
votes
1
answer
114
views
Violating the prohibition of wearing Sha'atnez
When does one become liable for wearing Sha'atnez? Is it merely putting the garment on one's body? Is it when the act of dressing is complete (ie., buttoning the last button, zipping up the zipper, ...
- 41.5k
12
votes
5
answers
8k
views
What is the absolute minimum length for peyos?
I have often heard that 1/4th of an inch is the minimum length of the hairs in the peyos area. For example, that is mentioned in an answer to a previous question:
How to advise your barber
My ...
- 4,199
4
votes
2
answers
174
views
What's the Source for Jerusalem and Sepphoris Having Larger Measuring Units?
In Rabbi Pinchas Kehati's introduction to Masekhet Challah, and again in his commentary on Eduyyot 1:2, reference is made to the adjusting of measurements when the Jews "arrived at" Jerusalem, and ...
- 18.8k