measurements relating to the performance of different Mitzvot

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38 views

Meaning of “emunah shlaima”? [closed]

The Rambam's 13 Articles of Faith begin with the statement: "אני מאמין באמונה שלמה" - "I believe with complete faith...", words that then go on to express our faith that God "creates and guides" all ...
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1answer
62 views

3 tefachim minimum height for candles on Chanukah - from the flame itself, or base of the chanukiyah?

For Chanukha Shulchan Aruch (תרעא:ו) writes: ...מניחו למעלה משלשה טפחים To which the Mishneh Berura writes: דכל למטה משלשה כאלו הניח בקרקע ואין ניכר שבעל הבית הניחו שם "For anything ...
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2answers
85 views

Is there a halachic time limit for sending an organization its charity box money?

Many Jewish organizations distribute tzedaka (charity) boxes. A few that I know tell people, "collect the money and at some point, empty the money and mail us a check." Let's say someone leaves this ...
4
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1answer
142 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 ...
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1answer
72 views

What is considered the “correct speed” for a Shabbat morning service?

I've had a few discussions with various co-congregants about "fast" and "slow" minyanim. Our shul building has 2 minyanim. The main one has a professional chazzan. We begin Shabbat services at 9 am ...
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1answer
55 views

How traditional measurements of Omer fit with Shemot 16:16?

According to this Omer is 2.5 liters or more. This is too much bread per person as specified in Shemot 16:16? How do traditional sources justify the value of Omer? Shemot 16:4,8,12,15 e.t.c calls it ...
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1answer
56 views

What is Omer and how much is it?

My understanding is that Omer is a handfuls, which is about 1 US Cup or 236g. This is exact amount needed to produce bread for one day for one healthy adult. What do traditional sources say an Omer ...
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69 views

How much skin is a woman halachically allowed to show from the neck downward?

Is there a requirement to how much skin a woman can show - when going out in public - from where the neck ends to where the torso begins going downward at the top of her shirt? The question is ...
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12 views

Why are Shabbat candles lit 18 minutes before sunset? [duplicate]

My understanding is that the number 18 is the amount of time it takes for an average person to walk 1 mil (side Q, how does this measurement translate to current English or metric units?) Why was ...
5
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1answer
198 views

Minimum amount of food for Beracha Rishona

I've heard much discussion about minimal amounts of food to qualify as eating (eg. this discussion about how much Matza to eat at the Seder). How much would one need to eat in order to say a Beracha ...
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1answer
385 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 ...
2
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1answer
42 views

Teaching halacha to children with halachically invalid “props”

The Talmud (Sukkah 2b; cited also here) implies that chinukh (educating children in halacha observance) necessitates that the mitzvah be fulfilled according to its halachik details (at least with ...
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4answers
893 views

Why do we say “You should live till 120”?

Prior to the Mabul people lived for hundreds of years. After the Mabul lifespans shortened although we see that the Avos lived in the 180 year range. In the Pasuk in Tehilim we say Yemei Shenoseinu ...
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1answer
115 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 ...
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1answer
96 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 ...
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2answers
126 views

How big can a mezuzah be?

I read in the news about an Israeli designer, Yaakov Merdinger, who created the world's largest mezuzah case. As you can see in the photo, the mezuzah case is bigger than the door. Is this kosher? ...
2
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1answer
38 views

How far does one have to go into the ocean to say HaGomel?

When one goes "into" the sea, one is obligated to say HaGomel (see Berachos 54). How far does one have to go to be considered "in" the sea? If one goes swimming on the beach, does one say HaGomel? ...
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1answer
127 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 ...
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2answers
1k views

18 minute Matzah?

Are there sources EXPLAINING why we have to make matzah within 18 minutes? I understand having a time limit if in fact the reason we eat matzah is to reenact the speed which we left Egypt (that ...
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2answers
109 views

How long does entire process of baking matzo take to be kosher?

If one would like to bake matzo or use flour to make a Passover food, how long do we have for the process to take place? If 18 min, then is that 18m59s or 18m00s? If the food is cooked before 18 ...
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1answer
216 views

What is the hallachic definition of randomness?

A new Shabbat-friendly technology, KosherSwitch, uses randomly timed light pulses to create various safeks, so that flipping the switch does not hallachically count as switching the light on, even in ...
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3answers
371 views

Saying 100 Berachoth in a day

What is the source for the idea that one should say 100 Berachoth in a day, and how serious of an obligation is this? Is it mandatory, is it laudatory, or is it merely a nice idea?
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1answer
240 views

Is ice considered food or drink in Halacha?

Is ice considered food or drink in Halacha? So for example, if one would eat an kezais of ice on yom Kippur, but it would not be equal to a reviyis, would he be liable for a chatas?
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1answer
39 views

Is there a concise book on how math and measurements are used in Torah and talmud?

Both the Torah and Gemarrah use math in various places, e.g. percentages (5ths (certain penalties); 10ths (ma'aser), etc.) They also use many terms of measurements - e.g. shekel = 20 gerah; numerous ...
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58 views

Can you carry an object from the step outside your house inside your house?

According to the laws of carrying on shabbos one may not carry from one domain to another aside from a makom petur ("exempt area"). A makom petur is less that 4X4 handbreadths and more than three ...
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2answers
184 views

Source for the concept of learning 1 hour on Shabbat is like 1000 during the week?

There is a Benayahu on Taanit 11a I think that may hint to this, but not clear enough. Is there an actual source for "1 hour learning on shabbat is like 1000 hours during the week"?
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1answer
95 views

Regarding chametz, what is considered “not fit to be eaten by a dog”?

Regarding whether something needs to be considered chametz or not, there is a general rule of ראוי לאכילת כלב - i.e. - if a dog wouldn't eat it, then it's not considered food and therefore it is not ...
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1answer
233 views

What are these three types of Amos?

I'm not one to usually go to Google itself to learn about Judaism, but I feel that the circumstances around how I discovered this is really intriguing... Google Maps has a nice little feature that ...
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1answer
244 views

Eating out Friday night of Chanukkah

If one is lighting Chanukkah candles inside (for whatever reason) relying on the publicization to himself and his family, then what should he do on Friday night if he is eating out? Must he make the ...
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3answers
102 views

Ad Dlo Yoda measurments

What are the many Halachic options of doing the Mitzvah of drinking on Purim please quote sources? Meaning what are the diffrent the definitions of ad Dlo Yoda?
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91 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 ...
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2answers
91 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. ...
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6answers
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Is a rare steak kosher?

If you have a steak medium to rare, such that it's still pink in the middle, is it kosher? At what point is meat cooked enough?
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115 views

Ending place of the Peya

It seems from my understanding of the Shulhan Aruch (Y"D 181:9) that the picture above is the Shiur of the Peya. However it seems like most people say it goes until the bone like the picture below. ...
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Would halachic units be shrunk if a person was (Honey, I Shrunk the Kids-style)?

In the classic move Honey, I Shrunk the Kids and its sequels, people get shrunk down to 1/264th of their normal size. So, a person is around 1/4 of an inch tall. If such a thing were even possible, ...
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85 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 ...
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2answers
118 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.?
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1answer
82 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?
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1answer
49 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 ...
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1answer
52 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 ...
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3answers
925 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 ...
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0answers
44 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 ...
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2answers
93 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 ...
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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 ...
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213 views

What is the source for washing Mayim Acharonim with only a few drops of water?

OC 181 (4) MB [10] says that when washing mayim acharonim one must wash up to the second knuckle and using a few drops does not fulfill the mitzvah at all. Shulchan Oruch HaRav 181 (4) says there is ...
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158 views

Measurements used in Halacha

What is the underlying argument between the Chazon Ish and Rabbi Chaim Naaeh and Reb Moshe Feinstein? I know they argue in amounts, but what is the underlying argument? How did each get the ...
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39 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 ...
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1answer
71 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 ...
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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 ...
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52 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, ...