Saturday, February 25, 2006

What I learned today, and yesterday

Funny words:
schizoid (disorder)- a personality disorder characterized by a lack of a desire for social relationships.
sexagesimal- fractions employed by Babylonians around 1320 A.D., based on dividing units into 60 parts. This is how the minute and hour were eventually divided into 60 parts.

Interesting Principles:
The gradient of a scalar field maps the direction of greatest increase of the scalar field as a vector field.
The divergence of a field is, in physics terms, the rate of change of the amount of "stuff" per unit volume per unit time. SO, the volume integral of the divergence is the rate of change of mass going through a particular volume per unit time. It is related to flux by Gauss's theorem, which states that the total flux over a closed surface is equal to the total divergence of the flux over the volume the surface encloses.

These are actually really hard to understand, and it took me FOREVER to get them, which kind of makes me frustrated because now I have only a day to understand all of the electromagnetism which feynman presents (like 5 chapters, each of which take an hour = impossible).

Fun Facts:
Ice cream made with liquid nitrogen cooling is tasty apparently.
If you run an AC current through a pickle, it glows.
There are 5 different tastes we have: sweet, sour, bitter, satly, and umami. Umami is a flavor commonly used in the East, and is the taste of MSG. Tomatoes and parmesean cheese also have umami, however. I characterize it as a "meaty" flavor.

Cool Quote:
"When it comes to procrastinating, I do it right away!" Dunno who said that...but it's clever.

No comments: