Sig. Figs and Vectors!

                 Today in class, we did a brief review on Sig. Figs (which was needed very much) and we started learning about vectors and scalars and magnitude and direction!  First of all, I am really glad that we went back over the sig. figs because I do not think I was fully understanding the rules about what makes a digit significant.  I thought all zeros counted, including leading zeros.  I realized that I was quite wrong so Mr. O'Connell really cleared that up for me.  After that, we moved on to vectors.  We discussed magnitude and vectors and directions and it was a long day!  Fortunately, because Mr. O'Connell's an amazing teacher,  the majority of us, if not all, walked away understanding the lesson.