after my unproductive morning, i decided to get my life in order. i went to office depot and bought a bunch of organizational furniture... desk stand, file cabinets, file folders, pencils, etc... then I cleaned my room, my desk, made my bed, and did a bunch of homework.sarah
(livejournal user #8 and friend from first year in college) came by and visited me about 6:00 pm... that was cool. hadn't seen her in awhile. made me happy.
afterwards blythe came over and I cooked us macaroni and cheese and dr. pepper. gourmet.
now i'm working on physics. the homework is all web-based now, so we know right away if we got it right or not... no showing our work, kick ass. i'm stuck on these two:"Two fixed particles, of charges q1 = +2.0 µC and q2 = -7.0 µC, are 14 cm apart. How far from each should a third charge be located so that no net electrostatic force acts on it? "
Seemed easy (4.88 cm), but I keep getting it wrong."Two engineering students, John with a weight of 180 lb and Mary with a weight of 90 lb, are 100 ft apart. Suppose each has a 0.04% imbalance in the amount of positive and negative charge, one student being positive and the other negative. Estimate roughly the electrostatic force of attraction between them by replacing each student with a sphere of water having the same mass as the student."
No clue. Need to read the book I guess. But what's with the stupid units?