course phy 121 lab questioncourse phy 121 This wasn't my question and I don't know where it came from! I asked about the short version of the lab for assignment 21. Is it optional for me as a Principles of Physics student or recommended? In the interest of time I would much prefer to do the short version of the above lab, but I don't want to hurt my lab grade. I know I have not resubmitted some labs that you have asked me to make changes on and resubmit, and I don't know how that has affected my lab grade. I am working an extra day this week, and I have a paper to write for my Soc studies class, so I would really like to do the short version if it won't have an adverse effect on my grade.