Monday, May 10, 2010

:O Last blog post!


So hard to believe that this is the last one... it seems like the year just began, and all of a sudden the exams are upon us. ><><). The point where the graph passes the x axis, where the preparedness is zero, is the point when I walked into the physics room right before the multiple choice part of the exam, and realized that I didn't know anything. The most negative point was the end of the multiple choice exam. :P Right now, I'm feeling pretty good about the exam... but since it's a wave I'll likely feel really unprepared in half of a wavelength. Since I went through one wavelength in about a week (from the point I started studying to the point when I was done with the free response), I estimate that if the frequency stays the same then I'll be really depressed in about half a week... But I think the frequency is increasing since the AP exam is tomorrow... *panics* The amplitude of the wave is the range from very prepared to negative preparation...

This course was fun, overall... if you enjoy pain. (Just joking. ;) ) I feel like maybe I should have written a serious last post, but that's ok... *points to above picture* although I may have gained many things through physics, paint skills aren't any of them...

Still though... only two days of physics left... :D

Sunday, May 2, 2010

Cheepcheepcheeeeeeep



Nooooo... I just wrote a whole blog entry and then firefox froze on me... :( I get to write it again...
This cute little chick you see here (yes, he's cute, even though you can't see his eyes because he's unnaturally fluffy; if he was real, this might be a problem) is my brother's toy. He has two little metal contacts on the bottom. If you touch only one, nothing happens, but if you touch both, the little chick goes cheeep. Interestingly, if you touch one, get a friend to touch the other one, and touch your friend, it also goes cheep. This is because either way, you're completing a circuit. There are batteries inside the chick that provide a potential difference; here we'll assume that there are 3 button cell batteries, each with a voltage of 3 volts. They are connected in series, so you add their voltage, giving the circuit a total potential difference of 9 volts. If you pretend the speaker and circuit board have a resistance of 3 ohms, then you can calculate the current using V = IR as 3 amperes.
Ignore the fact that I took the picture of the chick on my brother's lap desk... :P