Sunday, July 8, 2018

travel - Davening on Plane Zmanim



How do you know when to daven Shachris on a plane?



Answer



http://www.chaitables.com/chai_air_eng.php


No comments:

Post a Comment

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{...