Commonly refers to acts of labor that are forbidden on Shabbos/Yom Tov.

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Reboiling water and reheating chulent on shabbos [duplicate]

Possible Duplicate: Blackout restoration on Shabbath - and your food Last night, after we had all gone to sleep, there was a power outage. From reports in the community, it seems that the ...
13
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3answers
340 views

Using Post-its on Shabbos

Is one permitted on Shabbos to use post-it notes or adhesive page flags to mark content in a book for future reference after Shabbos? Would there be an issue with the adhesive or leaving the page ...
2
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3answers
225 views

Can I light a new fire on yom tov?

If I can transfer a fire, can I light a new fire on yom tov? What's the difference between lighting a new fire and transferring a fire? Aren't they part of the same melacha?? The melacha is to create ...
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1answer
84 views

Does “burning” water fall under the Av Melachah of “bishul” on Shabbos?

If water that falls onto a hot plate on Shabbos immediately "burns" up and evaporates, does this fall under the Av Melachah of bishul? (The pracitical application of this I want to leave aside. ...
3
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1answer
173 views

Borer and Grinding on Yom Tov - and other Melachoth that are Ochel Nefesh

Which Melachoth are prohibited on Shabbath but are permissible to perform on Yom Tov because of the exception of Ochel Nefesh? Famously, cooking and carrying in the public domain are allowed, yet ...
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1answer
166 views

Inflatable Mattress on Shabbos

Is one allowed to pump air into an inflatable mattress on Shabbos? Is this a problem of tikkun cli, makeh b'patish, etc? (Or any other problem.) What about if the mattress was inflated Erev Shabbos ...
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2answers
279 views

10th man drove to shul on shabbat

If one of precisely ten men, who form a minyan, had driven to shul (the synagogue) on shabbat, is that an acceptable minyan? I would have though not, since one is benefiting from his melacha on ...
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3answers
332 views

Why is braiding hair “building”?

The gemarah in niddah (45) says that when the torah says that God "built" Eve out of the bone of Adam what actually happened is that God braided Eve's hair and presented her to Adam as a wife. This is ...
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1answer
99 views

Delousing on Shabbat (- Mishna, Shabbat 1:3)

In the Mishna, Shabbat 1:3, it states (amongst other things) that one should not delouse one's garments by candlelight on Shabbat (ולא יפלה את כליו... לאור הנר). The following mishna, however, states ...
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1answer
109 views

Can you destroy a spider web on Shabbos?

Can you destroy a spider web on shabbos if you simply do not want it around (you consider it unseemly)?
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1answer
79 views

Heating non-food items on Shabbath

Is it permissible to heat non-food items on Shabbath? Assume the method of heating is to use an existing heat source (a blech, or the top of a crockpot or hot water urn). Would it matter if it is ...
4
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1answer
210 views

Ice-cream scoop on Shabbos

Is there anything wrong with using an ice-cream scoop to dish ice-cream on Shabbat? I have been told in the name of a Rebbetzin that you can't.
6
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2answers
197 views

Is one allowed to cut olives or grapes on Shabbos?

On shabbos, it is a biblical prohibition squeeze olives or grapes specifically for their juices, though one may squeeze them if the juices are used directly to enhance a solid food. As an additional ...
8
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1answer
211 views

Making a origami creation on shabbos?

Would it be a violation of one of the thirty-nine melachos if someone made a paper airplane or made origami creation on shabbos? (And I know a melacha is loosely translated as "creative work".)
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1answer
322 views

Boiling over a pot to extinguish burners on Yom Tov?

Generally, on Yom Tov one is allowed to light a gas burner (using a pre-existing flame), but is not allowed to turn off the gas burner. This is because one may light a fire on Yom Tov, but not ...
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3answers
629 views

Inviting a non-observant Jew on Shabbat or Yom Tov

Can I invite a Jew for a meal on Shabbat or Yom Tov if I know they will drive to my house?
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1answer
49 views

Deliberately planning to do work for the community on Chol HaMoed: Is it allowed?

We are setting up a new (money) Gemach. To register as a charity, a bank account is now needed. We were told of this on Thursday around noon. We were unable (too busy getting ready for Yom Tov) to get ...
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2answers
172 views

Combing the beard on Shabbos vs. weekday?

It says here that One is not allowed to use a comb on Shabbos to comb his hair because one will ultimately pull out hair while combing. This is forbidden even if one will only run through the ...
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1answer
65 views

Product of Melachah that wasn't really necessary, except that in the end it was

If Melachah was performed on Shabbath, but it was not necessary for the enjoyment of the product of the Melachah, can that product be enjoyed? What if the Melachah was the result of some other ...
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3answers
86 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 ...
13
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2answers
679 views

Bootstrapping problem: havdalah ends shabbat (for one who didn't daven ma'ariv) but lighting the candle is melacha?

This answer to a question about melacha before havdalah notes that in that situation one should say "baruch hamavdil bein kodesh l'chol" first. Does that apply to lighting the havdalah candle? I ...
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2answers
149 views

Opening bottles and creating a Keli on Shabbath

Does opening a new bottle create a new Keli, such that it would be prohibited on Shabbath? (I personally don't think so for a few reasons. However, someone posted this question a little while ago ...
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1answer
203 views

Should separating pull apart Challah rolls be considered a forbidden act of completion?

I have heard many people state that using Challah* rolls that are baked in one unit to be pulled apart might be a problem for making Leḥem** Mishneh on Shabbath. In fact, there are rolls that are sold ...
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2answers
485 views

Is there any issue with using aerosols on Shabbos?

I've heard from many people that you shouldn't use aerosols (such as air fresheners, disinfectants or deodorants) on shabbos, usually citing some vague reason of changing the form from liquid to gas, ...
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2answers
1k views

Why can't electricity be manipulated on Shabbat?

Why can't we use and change electricity on Shabbat and YomTov? By this I mean why can't we turn on and off lights...? I'v heard Rabbis say that its because you can't complete a circuit on Shabbat, ...
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2answers
290 views

Can you leave video chat on over Shabbos?

Basically: Can you leave your computer with video chat on (to another person) on over shabbos? And what if there's also audio? For example a relative in the hospital, relatives that in a far away ...
17
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3answers
413 views

Can I cause a Melacha to happen in a place where Shabbat has already started?

For example, if I live in New York, could I send a fax (causing the machine to print a document) to Israel on Friday afternoon, before it is Shabbat for me, but after Shabbat has started there?
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2answers
404 views

Non-Yemenites who heat up soup after the start of Shabbat?

The most widely held practice regarding heating up liquids on Shabbat is that it is prohibited, though there are differences of practice between Ashkenazim and Sephardim regarding sauces and such ...
8
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1answer
143 views

Is braiding challah the melacha of weaving?

Oreig (weaving) does not appear to be a permitted melacha on Yom Tov. Braiding is oreig - may one braid challos on Yom Tov? If so, would it follow that one may braid anything on Yom Tov so long as ...
8
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2answers
172 views

Ask a friend to carry on Shabbos

Suppose there are two friends: one holds of the eiruv and the other doesn't. Is the second allowed to ask the first to carry for him? And if the first anyways carried it, can the second benefit from ...
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2answers
377 views

Why does writing on Shabbos need two letters?

In order to transgress "writing" (כותב) on Shabbos, (m'd'oraysah) one must write two letters. (See for example here.) Why is this so? Shouldn't writing anything still be considered writing? For ...
8
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1answer
298 views

Cocktail mixing (shaking & straining) on Shabbos

Is one allowed to use a shaker to strain an alcoholic drink on Shabbos? I have been told that it is mutar to use a pitcher with an ice guard on Shabbos, but I do not know the reason why this is not ...
8
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2answers
590 views

Where does the concept of a Kli Shlishi come from?

When it comes to cooking on Shabbos, most people hold that things that are not allowed to be put in a Kli Sheni (a vessel once removed from the vessel that was on the fire) because it is considered ...
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2answers
172 views

Is using a book with letters stamped on the sides melacha (erasing) if the book wasn't closed in the first place?

A comment on this question points to the following from OU: Likewise, when words are stamped on the edge of a book (as is the case with most library books), these letters are separated when the ...
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6answers
2k views

Is using a Kindle on Shabbat permitted?

A Kindle is an e-book reader that uses "e-ink" rather than an LCD screen. It has physical controls to turn pages. If left unused it enters a sleep mode, and you can return to reading by moving a ...
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5answers
1k views

Is using the internet on Shabbat against melachos?

Is it against melachos to look at the internet during Shabbat? How can you interpret the Melachos to apply to the 21st century? Is there a difference between looking at the internet for purely ...
5
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1answer
184 views

Melacha on Shabbat - At which stage of removal does something become legal?

I had heard of something relating to melacha on Shabbat from an (orthodox!) rabbi who mentioned something really interesting. At a certain level of removal, one can indirectly perform melacha. It was ...
6
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1answer
454 views

Asking Questions on StackOverflow on Erev Shabbos

Is there a problem with asking a programming question on StackOverflow (or any other StackExchange site) on Erev Shabbos, so that they will eventually be answered by the time Motzei Shabbos arrives? ...
2
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0answers
138 views

Is playing with Legos© permissible on Shabbat? [duplicate]

Possible Duplicate: Lego on Shabbos I have wondered this for a while. It would seem that it would be forbidden under creative building. Is there a difference regarding whether one tears ...
2
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1answer
112 views

Making Fruit Punch on Shabbos

Why is making fruit punch on Shabbos not a problem of coloring?
5
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1answer
120 views

Can a talit be a tent?

There are two situations in which a talit is held aloft in a possibly tent-like manner that make me wonder whether they present any danger of transgressing the prohibition of "Building" on Shabbat and ...
3
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1answer
71 views

Isur m'lacha starting at night on yom tov

How do we know that the prohibition against doing m'lacha on chagim begins at sunset and not dawn?
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3answers
500 views

Tying a Tie on Shabbos

How should one tie a tie on Shabbos (or yom tov) so that it doesn't have any knot problems? In other words there are lots of ways to tie a tie. I was wondering which of these are okay for use on ...
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0answers
79 views

answering questions on mi.yodeya on Chol Hamoed [duplicate]

Possible Duplicate: Typing on Chol Hamoed Is answering questions on mi.yodeya.com considered working therby making it assur to go on the website on chol hamod
10
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3answers
360 views

Glow sticks on Shabbos

May one activate a glow stick on Shabbos? (In other words, is there a prohibition on activating the chemical reaction which produces the light in a glow stick?)
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2answers
182 views

May one put cut flowers in a vase of water on Chol HaMoed?

I know certain agricultural activities are prohibited on Chol HaMoed -- it's not the recommended time to do gardening or lawn-mowing (if there's sudden pressing need, talk with your rabbi). What about ...
6
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2answers
97 views

How exactly was extinguishing used constructively to build the Mishkan/Tabernacle?

One of the 39 categories of forbidden labor on Shabbos is "extinguishing" (mechabeh); how exactly was it used in a constructive fashion when building the Mishkan?
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2answers
202 views

Why is squeezing a ketchup bottle on Shabbos not considered Dosh (Melechet Dash)?

Why is squeezing a ketchup bottle on Shabbos not considered Dosh (Melechet Dash)?
5
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0answers
100 views

Pre-Havdalah Melacha [duplicate]

Possible Duplicate: Bootstrapping problem: havdalah ends shabbat (for one who didn't daven ma'ariv) but lighting the candle is melacha? After nightfall before Marriv, or after ...
9
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1answer
136 views

Tzoveah on Shabbos

It is going to sound strange but here is the question In the toilet there are these blue things that clean your bathroom with every flush by adding bleach hence it colors the water blue every time you ...