I will soon finish writing my Bachlor thesis in physics and I don't know whom I "have to" put in the acknowledgements.
There are two professors who will grade the thesis, one the head of the work group I'm writing the thesis at and the other one from another work group. I didn't have much personal contact with any of the two other than getting their signatures for some paperwork and talking about half an hour about the subject. They appear on the thesis as advisors.
The actual advisor is a PhD student from the work group; a practice fairly common, at least at the physics department. He has been really involved and helped me a lot.
So I was thinking to thank the head of the work group for the possibiliy to write the thesis there and one or two sentences for the actual advisor.
But most of my fellow students seem to mention a lot more people like the second advisor (Professor), friends, boy-, girlfriend, family...
My problem with that is that the second advisor is not involved at all in the process (he works in a related field, but the workgroups don't really collaborate), but I am concerned that it might be seen as an insult. I can see why one thanks close friends and family in a PhD thesis where one works on for years but I think it is a little melodramatic in a Bachelor thesis (which takes four months, not full time). But I'm afraid this might come off as ungrateful or heartless.
Is it expected or recommended to put second advisor, friends and family in the acknowledgements?