The size of the dirham

Q: I want to know about impurity that is equal to one Dirham. As I am in Pakistan, so tell me the size of the coin here. I have searched a lot but I didn't understand clearly. So please tell me in simple words. Also, I am very disturbed due to semen. Bad thoughts come untimely and some liquid comes out, so that Dirham concept applies here? Because I pray five times a day, I can't take a bath again and again. Please help me.

Becoming a software engineer

Q: I am interested in becoming an apple software engineer but is it halaal or harm for work there? Is working for a company which sells computers, laptops, phones is halaal or haraam? If I sell a computer to a buyer if that buyer uses it in any bad ways will I get sins?

Filing one's teeth in the state of janaabat

Q: Can a person in janaabat (sexual impurity) do teeth capping and teeth filing? Will the person become pure (free from sexual impurity)? If ghusal is done after teeth filing and teeth capping, does teeth filing and teeth capping in janabah (sexual impureity) have any affect on purity after ghusal, will the person be pure to read namaz after ghusal. Please help me because thinking all this I am going mad.