measurements relating to the performance of different Mitzvot

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5
votes
3answers
276 views

Sechach supported partially by metal

For those who are careful to only support their sechach on sechach-eligible materials, how much does it matter if a small amount of the sechach inadvertently rests on non-sechach-eligible materials? ...
7
votes
3answers
441 views

Is human blood treif?

OK, I know it isn't kosher, but what is the shiur? And do we hold "chetzi shiur assur min haTorah"? For an application, what if you get a cut while hiking in the woods; is it assur to clean the wound ...
3
votes
2answers
146 views

Machatziz hashekel

How much money is a Machatziz hashekel.
3
votes
2answers
121 views

Shalom alecha rebbi (u'mori)

What is the significance of the time it takes to say Shalom Alecha Rebbi (U'mori)?