Why does a man have to wear a yarmulke? Is there a law that requires a jewish male to cover their head and what is the reason? Does it mean he is disrepectful if he does not?

Dear Rabbi- Is it true that a conservative conversion is not recognized by Israel or by Orthodox Jews? If I converted through a conserrvative rabbi/beit din can I practice in an orthodox shul?

I heard somewhere that the Rambam says one who doesn't eat meat because it is cruel to animals, or "G-d wouldn't want us to eat animals" is a mumar, but if he is vegetarian because he feels it is more healthful it is fine. What's the story?

what is a baby naming

why a rabbi has got this long sideburns?why you always wear black clothes?what happens if a rabbi eats blood?and pork?do you enjoy the life living in this way?why the women always must wear long sleeve,long skirts and leggins?