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From: Evan Kirshenbaum on 31 Mar 2010 13:35 Tak To <takto(a)alum.mit.eduxx> writes: > Btw, I find the arrangement of the typical US high school > curriculum, in which biology ("life science"), chemistry and physics > were divided into separate years of study totally insane. Why not > study a little bit of everything each year? That's what we do before high school. In high school separating them both allows them to be studied in greater depth and allows you to have teachers who specialize. I'd opine that to study biology in any depth you need to have a fair grounding in chemistry. And to study physics in any real depth requires at least some calculus. At my high school, the track for those of us with mathematical and scientific aptitude started with a year of non-calculus physics, then proceeded to chemistry, and biology, finally finishing up with a second year of the one or two subjects you had the most interest in (I chose biology and physics--this time with calculus). > Ditto for the division of mathematics courses. An entire year of > "Geometry" sandwiched between "Algebra I" and "Algebra II"? Absurd! The point of geometry isn't really to teach geometry. It's to teach formal proof. The first year of algebra is to teach how to think of things in terms of variables and equations. And even when I was in school, again for those of us with some mathematical aptitude, our year of algebra was before we hit high school. My high school track was geometry, trigonometry, analytic geometry, calculus. My son's been getting algebra-ish basics since about third grade (way before we did in class) and I believe that he gets it formally next year in seventh grade, a year before I did, and so he'll probably be through geometry before he hits high school. -- Evan Kirshenbaum +------------------------------------ HP Laboratories |...as a mobile phone is analogous 1501 Page Mill Road, 1U, MS 1141 |to a Q-Tip -- yeah, it's something Palo Alto, CA 94304 |you stick in your ear, but there |all resemblance ends. kirshenbaum(a)hpl.hp.com | Ross Howard (650)857-7572 http://www.kirshenbaum.net/
From: Evan Kirshenbaum on 31 Mar 2010 14:26 "Brian M. Scott" <b.scott(a)csuohio.edu> writes: > Evan Kirshenbaum wrote: > >> Peter Moylan <gro.nalyomp(a)retep> writes: > >>> Evan, you have grasped the essence far more quickly than those who >>> claim to have read Resnick and Halliday. (That's a very old >>> introductory physics textbook, in case you don't know. It's so old >>> that I used it myself as a first-year student. > >> I know. It's the one I used as a high school senior in 1981[1] >> (although it was "Halliday and Resnick" back then). > > It's one of the two that I think were most common when I was an > undergraduate in the late 60s, the other being Sears & Zemansky. I think that Sears & Zemansky was the one I used as a supplement when studying for the AP test. -- Evan Kirshenbaum +------------------------------------ HP Laboratories |Specifically, I'd like to debate 1501 Page Mill Road, 1U, MS 1141 |whether cannibalism ought to be Palo Alto, CA 94304 |grounds for leniency in murder, |since it's less wasteful. kirshenbaum(a)hpl.hp.com | Calvin (650)857-7572 http://www.kirshenbaum.net/
From: Evan Kirshenbaum on 31 Mar 2010 14:28 Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups(a)NTLWorld.COM> writes: >> >> >> And he also shouldn't assume that everybody's news server has >> received all of the same posts at the same time. No matter how smart >> the news client is, it can't thread posts that haven't arrived yet. >> > Wrong. The References: header enables threaded newsreaders to do > exactly that very thing, and they do. Jamie Zawinski documented the > algorithm for Netscape Communicator in 1997, but it was known long > before. It is, after all, not hard to figure out. Henry Spencer > described such processes in "Son of RFC1036" in 1994, for example. > Mark Crispin and Kenneth Murchison put the algorithm into the IMAP > THREAD IETF draft in 2001. How one deals with message IDs that > correspond to messages that haven't arrived yet is on page 5. It's on > page 9 of the final RFC. Does it detail how one figures out the author of a message that hasn't arrived yet? -- Evan Kirshenbaum +------------------------------------ HP Laboratories |"Algebra? But that's far too 1501 Page Mill Road, 1U, MS 1141 |difficult for seven-year-olds!" Palo Alto, CA 94304 | |"Yes, but I didn't tell them that kirshenbaum(a)hpl.hp.com |and so far they haven't found out," (650)857-7572 |said Susan. http://www.kirshenbaum.net/
From: Mark Edwards on 31 Mar 2010 14:34 [Ohm's Law arguments] No cluons were harmed when ke10(a)cam.ac.uk wrote: >That would be a tenable view, but asserting that either definition is >fundamentally wrong is about as much use as disputing about angels > on the head of a pin. I find your attempt to use Ohm's Law to zap angels vaguely disturbing. Mark Edwards -- Proof of Sanity Forged Upon Request
From: Otto Bahn on 31 Mar 2010 15:06
"Hatunen" <hatunen(a)cox.net> wrote >>>>>>Out of curiosity, is the resistance of charred skin the same as >>>>>>the resistance of normal skin? >>>>> >>>>> If it's charred I would imagine it's lower. >>>> >>>>I'd guess the absence of water would make it go up. >>> >>> Water, per se, is a pretty good insulator. >> >>If you were that low on electrolytes, you'd already be dead. > > Read again. The subject at hand is the charred area. Oh go step in a puddle with a live wire in it then. --oTTo-- |