I can stop any time I want to.... 
[Apr. 12th, 201306:58 pm]
John

So, I bought a Freshman Physics book. And I started working problems. And I was appalled.
I didn't have a scientific calculator! Well, there are Android apps for that  so, that's fixed.
Then I found how hard it is to sketch vector diagrams on lined paper. Wait  how did I not have large quantities of graph paper around? (Any old D&D enthusiast could ask the same question. I still have my polyhedral dice, though!) And I couldn't lay my hands on my scale! (Um  those trianglecylindrical rulers that let you measure to different scales.) That's not *critical*  but a scale can really help one make a more accurate sketch. Technically, you could use a ruler, "this line is kinda like 3 times that one" but a scale just makes that easier.)
There  I now have them, and some extra mechanical pencils to boot.
But I did not get triangles, a compass, etc.. Yet. (Yes, yes, I also haven't had time to paint it or build it to scale....)
I'm done with vectors  trig is easy, after all.
(Ouch. I may have made some enemies with that  remember, I majored in math!)
I even figured out my problem on the one question that had the rounding error  one answer came out to something like 7.83 and the other came out to 7.858  so, yes, rounding to 2 significant figures would introduce a difference in the answers of .1, which makes perfect sense  the actual difference was less than .03, so both answers were correct, within the margin of error.
Time to "move on". (Hah! Get it? Because the next section is *motion*! I'm *moving on*... okay, I guess I'm taking high school nerd too far now, aren't I?)
Seriously, this is good and therapeutic... I wish I'd taken physics after I started acing math classes, because I just barely remember it, and it was never quite as interesting as it seems to be when I'm following the math in my head. 

