Problem solutions will be put on reserve in the library after the due date. Many of the problems ask for explanations, and these are expected in the grading. Similar requests for explanations or descriptions of physical phenomena are included in exam questions. Description and explanation are important and are tested. I generally expect you and your study partners to have made a legitimate attempt at the problems before coming for hints so your questions are focussed.
Most physics is done in collaborations.
Joint work on, and discussion of, the problem assignments will give you practice in working in a collaborative setting, something expected by most potential employers of physicists. I may assign some group problems during the semester. See homework strategy for some advice on how to work most effectively on the problems.