Aqaaid

Q: If someone takes the shahadah to become a Muslim, is it valid if he says it without sound (but with moving lips)? Or it must be in a loud enough voice to hear himself?

Q: If one is taking a course on evolution in university, can one write down the theories during tests? Can one talk about the theories but not believing in any of it?

Q: Should we kiss our thumbs and apply them on our eyes when Prophet Muhammad (sallallahu alaihi wasallam)'s name is mentioned?

Q: Please give me a link or reference of Quran Majeed app or website with translation and tafseer for mobile.

Also, please give an app or website on how to give Azaan and perform Namaaz correctly because we can't trust everything on the internet.

Q: Can a person do taqleed in Islam?

Q: If someone did a radio play for university coursework and their character in the script said an utterance of shirk, for example if they said "christ" and they recorded this, does that mean the sin is there and even if I deleted the recordings but there might be a file somewhere.

I knew it was wrong but I thought because its a character and I'm speaking the lines of that so it doesn't matter too much. Then I remembered how bad it was and the fact that it was part of the radio play. Now I'm trying to delete the recordings and finding out if it's anywhere else on my laptop. I deleted them and edited it out of the radio play but I am still stressed. Its because its recorded and I feel like if the cache or bit of the recording is still in the computer somewhere then is it still shirk?

Q: Please expand on the subject of superstitious beliefs in Islam. E.g. whistling in the house or cutting paper and rocking. Apart from the many other common household beliefs that are becoming a daily problem. 

Q: Some pleople say, "If Allah didn't create Muhammad (sallallahu alaihi wasallam), nothing of the universe would created" is it correct ? 

Q: 

1. Is it true that in the month of Rajab it is more sinful to commit sin and the reward also more?

2. What should one do specially in this month?

Q: What will be the status of the imaan and the nikah of a person who has fallen into bidah and makes statements as "Ya Shaykh Al madad" addressing his shaykh or addressing Hazrat Abdul Qadir Jailani "Ya ghos al madad"?

Will we still consider such a person as a Muslim? If he repents from these actions, will he have to repeat his nikaah with his wife?