Jack was nervous on his first day attending a new college.
no
The teachers went to college to visit their relatives
No, not unless it is a specific college..ie Manchester College, or if it begins the sentence.
"He went to College to study computing. ""We're going to college."
Example sentence - My favorite college class is zoology.
The electoral college represents a states population.
There were many societies at the college.
"College is draining me monetarily."
At the college party me and the 6 other girls had an awesome orgy.
When using it as a name please capitalize it.
Example sentence - He went to college to become a medical doctor.
A sentence using the word nuclear would be: He is going to college to study nuclear energy.