Misc.

I was curious if it is permissible to remove hair with depilatory cream when mourning. The reason is because there is a biblical prohibition against shaving hair (Deuteronomy 14:1) to mourn, but since it is according to many poskim Muttar to use depilatory cream on areas you’d otherwise be forbidden from shaving, does the same principle apply here that the biblical prohibition doesn’t occur since you’re not using an actual razor? Is it the same principle

In Halacha, is carried interest prohibited as ribbit? So Jew 1 owns an investment management fund, Jew 2 goes to him and pays for the value of the profit from the stock trading, and in exchange for managing the stocks in the fund Jew 1 gets 10% of the profit as a commission, is this prohibited as Ribbit?

Does halacha permit or prohibit a Jew to genetically engineer an animal with the DNA of another kind of animal, or is this considered “Kilayim” the forbidden mixing of two animal species? Does any rabbi talk about this

According to any authorities of Halacha, is metzitzah b’peh bal tosif

does a trailer need a Maakeh

Genesis 1:28 “And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.” Beyond p’ru urvu, does this mean domesticating animals is a mitzvah?

For English speakers, what are some resources (like in terms to where you can find it) for learning the Halacha of shekalim?

If somebody is interested in learning contemporary/modern halachic responsa (20/21st century) in the English language, what book or Sefer would you recommend them with a decently long lists of responsum/teshuvot

I have a question related to the k'zayit according the Halacha. I have read the correct amount of matzah to eat during Pesach is equivalent to "the size of an olive". However, the Rambam and other rabbis are very contradictory or ambiguous when it comes to defining the size of an olive; they often do it in terms of the size of an egg, which is equally difficult to measure or standardize. Some try to do this by agreeing it is the volume, not the weight of the olive that matters. My question is: Can the "size of an olive" be defined in terms of calories (thus eating the same calories of matzah as the calories found in an olive) or is that also incorrect? I think that calories are an equivalent unit for comparing food these days, more accurate than weight or volume, but I might be wrong. Thank you for answering my question! Eric