Is This Permitted?

Is it permitted to walk on a non-electric treadmill on Shabbat that is just a belt that uses gravity and has no electric components and does not measure anything?

My understanding is nowadays kohanim don’t eat Terumah due to presumption they have corpse uncleanliness. Since my understanding is a wife of or bat kohen is not prohibited from corpse uncleanliness can she eat it

I read in a tech magazine that Israeli scientists are currently working on developing gadgets that use artificial intelligence and virtual reality to enable the user to interact with the likeness of a real person. The software stores the physical image of a real person and as much information as possible about their personality and whatever knowledge and experiences they have had, plus it can learn more after the fact and apply that knowledge. A user can then put on goggles and a headset that enable them to have a simulated interaction with the likeness of this person. The purpose is to enable one to continue to feel like they have a relationship with their loved ones following their death. I am wondering what the implications of this are in Jewish law. Would this violate biblical prohibitions against making an image? Or those against communication with the dead? Or any biblical or rabbinical commandments?

Is it permitted to work an extremely dangerous job that risks one’s life but pays a lot of money? I am exploring the job of changing light bulbs on radio towers. One workday pays $130,000. I could live off of that easily for a year. I could do it for a few years and not have to work most of the time and then retire when I’m young. The danger is, if you fall, you die. About a dozen people a year die doing this job.

Is Euthanasia allowed in the Torah? I'm learning about assisted suicide for class and was wondering how legal it was Halachically. The idea of ending suffering before natural death does not seem like a Jewish concept, but there are some opinions online that state otherwise. I'm just trying to understand if we are or aren't and what the reasons may be, (with sources.)

Our new house was build weirdly in many ways. One of those oddities is the master bedroom can only be reached by walking through a bathroom. Does that mean we can never bring a siddur or any kind of sefer or my tefillin into the bedroom?

Does the prohibition against Counting Jews apply to Jews in photos

According to Halacha is it prohibited for Jews to enter synagogues wearing casual weekday clothing

According to Halacha, is human blood tumah for a kohen and can kohanim get blood donations

According to some poskim, beit haknesset and beit midrashim have some similar rules to the temple. My question is, according to Halacha can women who’re yoledet enter a synagogue even though she may not enter the temple to my understanding