If a person pours pure cold liquids into an impure cold container, does the column being poured become impure?
Halacha 1 states that a column of liquid being poured is not considered joined. Therefore, pouring pure liquid into an impure container does not make the column or the source impure.
Question 2
Under what condition does the column of poured liquid become considered as joined?
Halacha 1 states that if one pours pure COLD liquids into impure HOT liquids, the column is considered joined and the source container becomes impure.
Question 3
What is the effect of a tevel yom touching ordinary food (chulin)?
Halacha 6 states that a person who immersed to purify himself on the same day does not impart impurity to ordinary foods at all.
Question 4
Why is the column of Zif and Tzapachat honey always considered joined, unlike other liquids?
Halacha 3 explains that this thick honey remains attached to both containers and extends like glue, making its column always considered joined even from cold to cold containers.
Question 5
When a person who immersed that day touches a piece of terumah that is joined with other food, what does he disqualify?
Halacha 7 states that a tevel yom who touches one of the joined pieces disqualifies only that specific piece — he does not disqualify the entire connected mass as a primary impurity source would.