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Hachana: Difference between revisions

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* Yalkut Yosef ([[Shabbat]], vol 2, pg 216) rules that one may only learn Torah on [[Shabbat]] and the only exception is a medical student who has a test after [[Shabbat]] and is pressured for time to study medicine (except for the study of surgery) on [[Shabbat]]. Though in that one case where it is permissible to learn secular studies on [[Shabbat]] it is only permitted with regards to Hachana.
* Yalkut Yosef ([[Shabbat]], vol 2, pg 216) rules that one may only learn Torah on [[Shabbat]] and the only exception is a medical student who has a test after [[Shabbat]] and is pressured for time to study medicine (except for the study of surgery) on [[Shabbat]]. Though in that one case where it is permissible to learn secular studies on [[Shabbat]] it is only permitted with regards to Hachana.
* However, [http://www.ravaviner.com/2010/01/studying-secular-subjects-on-shabbat.html Rav Aviner] permits study for a test on [[Shabbat]] if one enjoys the learning and doesn't cause one stress. </ref>
* However, [http://www.ravaviner.com/2010/01/studying-secular-subjects-on-shabbat.html Rav Aviner] permits study for a test on [[Shabbat]] if one enjoys the learning and doesn't cause one stress. </ref>
# If you learned something and want to mark where it was you can fold over the paper and it isn't considered hachana.<ref>Shemirat Shabbat Kehilchata 28:16. See [https://judaism.stackexchange.com/questions/11827/is-one-allowed-to-fold-the-corner-of-a-book-on-shabbos Judaism.stackexchange.com].</ref>
# If you learned something and want to mark where it was you can fold over the paper and it isn't considered hachana.<ref>Shemirat Shabbat Kehilchata 28:16. See [https://judaism.stackexchange.com/questions/11827/is-one-allowed-to-fold-the-corner-of-a-book-on-shabbos Judaism.stackexchange.com]. Yalkut Yosef (Shabbat v. 2 307:12-17 n. 25) permits reading a draft of a Torah article on Shabbat and where there is a mistake folding over the paper. He says that you should only do it if you're planning on learning at the same time as checking it but not if you're only planning on checking it.</ref>


==Washing plates, cups, or utensils==
==Washing plates, cups, or utensils==
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# Some poskim permit taking food out of a freezer on Shabbat for a mitzvah meal after Shabbat in the event that it wouldn't be able to be ready after Shabbat unless it was taken out earlier. Additionally, it is only permissible according to these opinions if it is done in a inconspicuous fashion. The same is relevant for preparing from Shabbat to Yom Tov or one day of Yom Tov to another.<ref>[Mechezeh Eliyahu 64:35 http://www.hebrewbooks.org/pdfpager.aspx?req=21547&st=&pgnum=210] and Chazon Ovadia Shabbat v. 2 p. 447. Mechezeh Eliyahu adds that if it is an item that will defrost and a puddle of water will pool beneath it then it should be placed in a container with water in it so that the defrosted water is nullified by the water in the container.</ref> Other poskim hold that it is forbidden.<ref>Rav Shlomo Zalman Auerbach in Shulchan Shlomo 290:13 cited by Chazon Ovadia</ref>
# Some poskim permit taking food out of a freezer on Shabbat for a mitzvah meal after Shabbat in the event that it wouldn't be able to be ready after Shabbat unless it was taken out earlier. Additionally, it is only permissible according to these opinions if it is done in a inconspicuous fashion. The same is relevant for preparing from Shabbat to Yom Tov or one day of Yom Tov to another.<ref>[Mechezeh Eliyahu 64:35 http://www.hebrewbooks.org/pdfpager.aspx?req=21547&st=&pgnum=210] and Chazon Ovadia Shabbat v. 2 p. 447. Mechezeh Eliyahu adds that if it is an item that will defrost and a puddle of water will pool beneath it then it should be placed in a container with water in it so that the defrosted water is nullified by the water in the container.</ref> Other poskim hold that it is forbidden.<ref>Rav Shlomo Zalman Auerbach in Shulchan Shlomo 290:13 cited by Chazon Ovadia</ref>
# It is permitted to put back leftovers to a refrigerator on Shabbat to prevent them from spoiling.<ref>[http://www.hebrewbooks.org/pdfpager.aspx?req=21547&st=&pgnum=209 Mechezeh Eliyahu 64:24]</ref>
# It is permitted to put back leftovers to a refrigerator on Shabbat to prevent them from spoiling.<ref>[http://www.hebrewbooks.org/pdfpager.aspx?req=21547&st=&pgnum=209 Mechezeh Eliyahu 64:24]</ref>
==Cooking on Yom Tov for the Next Day==
See [[Cooking_on_Yom_Tov]]


==Other Questions==
==Other Questions==
# A parent may dress his young children in pajamas even if the children will be going to bed after Shabbat is over if this is the normal time for them to get into pajamas on every other day. <ref> Dinei Chinuch Katan pg. 190 </ref>
# A parent may dress his young children in pajamas even if the children will be going to bed after Shabbat is over if this is the normal time for them to get into pajamas on every other day. <ref> Dinei Chinuch Katan pg. 190. Igrot Moshe OC 4:105:3 writes that it is permitted to put children into pajamas on Shabbat even though they're only going to go to sleep after Havdalah if they generally wear the pajamas for an hour or two before going to sleep. Changing them isn't considered preparing for after Shabbat but a normal activity that is necessary now. Also, if the children are getting changed because their clothing are dirty it is permitted. However, if the intention in changing them is just to save time not to have to do it after Shabbat it is a problem. </ref>


==Sources==
==Sources==
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[[Category:Shabbat]]
[[Category:Shabbat]]