If one is reading a secular book about electricity in order to understand how it works so that I can learn the halachos of using electricity on Shabbos, would the studying of the secular book be included in the mitzvah of limud torah? So too, would the study of early Zionist history in order to understand the sugya of the Shalosh She'vuos also be considered limud torah?
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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions
Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...
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According to the values of boiling points that I found on internet the order is as follows: $\ce{H2O}$ > $\ce{HF}$ > $\ce{NH3}$ I was ...
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On-yomi of kanji feel a bit like they all sound alike. For instance, vowels /o/ and /u/ are over-represented. Are there statistics of phonem...
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Who knows one hundred fifty? Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will: Upvote a...
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Who knows seventy? Please cite/link your sources, if possible. At some point in the next few days, I will: Upvote all interesting answers. A...
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