How many prohibitions apply to an aveil (mourner) during shiva?
There are exactly 11 prohibitions for a mourner: haircut, laundering, bathing, anointing, marital relations, wearing shoes, work, Torah study, upright bed, uncovering the head, and greeting others.
Question 2
What is the source for the mourner's prohibition on Torah study?
The prohibition on Torah study is derived from God's command to Ezekiel: 'Be silent from groaning' (he'aneik dom) — implying that even Torah speech must be silenced during mourning.
Question 3
A mourner has 10 beds spread across 10 different cities. How many must be overturned?
The Rambam states explicitly: a mourner must overturn ALL his beds, even if they are in ten different homes in ten different cities. This applies throughout the full seven days of shiva.
Question 4
During days 7 through 30, what are the greeting rules for a mourner?
From day 7 to day 30, the mourner may initiate greetings, but others should not initiate greetings toward him. Full social normalcy resumes only after the thirty days (or twelve months for parents).
Question 5
Which of the following is permitted to a mourner during shiva?
A mourner may wash his face, hands, and feet in cold water during shiva. Full bathing (the entire body) is prohibited, as is hot water. Bathing to remove filth is also permitted.