Wednesday, May 16, 2018

halacha - Is wine from a Miracle Machine subject to Stam Yenam?


This article describes a kickstarter for a machine to make wine quickly out of grape juice concentrates. My question is twofold:




  1. Is such wine subject to stam yenam?

  2. Is it even Borei pri hagafen?




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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{...