Q: What is the ruling of covering one's head whilst eating?

Q: 

1. Is taweez shirk?

2. Is it proven that a person can wear a taweez as protection knowing that Allah is the protector.

3. Will reading 7 times surah alam nashra help in exams? 

Q: In our class some boys took an exam paper from our teachers laptop when he was out and they took pictures of it and maybe that is the same paper which the teacher is going to give us for the final exam. They did a wrong thing. I didn't have the courage to stop them. What should I do now? If I complain then all the boys will be saying bad words to me and they will mock me etc. But I dont need sin. And maybe if they dont get that paper then they will fail and maybe need to repeat the whole year (so much time and money will go to waste waste). What should I do? 

Q: I had a question regarding finance in islam, specifically investing in cryptocurrencies. I understand that it is only halal to invest in companies that do not deal with any haram acts such as interest or alcohol. However, I was curious to know, if company A, for example, is completely halal in its goals but is partnered with company B that is not halal such as a banking company, is it still halal to invest in company A?

I had a friend call a local sheikh who stated that it is halal to invest in company A since the goal of the company itself, for example to build an education platform, is completely halal even though company A is partnered with company B that is not halal. I just wanted to verify this information with another sheikh to put my mind at peace since I do still have some small amount of doubt. 

Q: I'd like to enquire about females sleeping with their hair open. Is it permissible, if not why?

Q: I have heard that a person who does not pray namaaz at all is a kafir. Is this true? What about a person who prays only in Ramadan. Will he or she be considered a kafir?

Q: I heard that our pants/trousers/shalwaar/jeans/etc. should always be above the ankles. What if I normally follow this thing but when I go to work or college and because of what people will say, for sometime I dont follow it and once I feel they are not watching me I follow it again, is it a sin? 

Q: How long should one remain silent between fatihah and the next surah in jummah prayers? The Imams of the Haram usually remain silent after aamen for half a minute.

Q: If a husband says to his wife get away from me or says pi** o** and says divorce from inside. Is the divorce valid? Some say that if divorce is not said out loud, it is not valid. 

Q: The problem I am facing is related to my love life. Is it going to get better? Is there any dua I can make or anything because currently I am going through this issue. It is affecting my present and future. Please let me know.