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  1. J

    B Horner's method confusion

    So I was trying to understand Horner's method. I understand that you can take a polynomial and factor out the x's and re write it as multiple linear functions recursively plugged into each other and that this makes evaluating a polynomial easier because you just evaluate a linear function...
  2. J

    B Help understanding continuing fractions

    They are mysterious to me, they do not make any intuitive sense. What is the context for them? I found this website. http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/cfINTRO.html It tries to show the history of how they were discovered geometrically. So you start off with a...
  3. J

    B I do not understand Log tables

    I was watching this video about how they invented log tables and some things I do not understand. At 5:12 he changes the scaling from 1's to 10's I don't understand how this is allowed. The number represents the number of times the base was multiplied by itself. In the seconds before this...
  4. J

    B PEMDAS and Physicists

    In case you have not seen the equation that has gone viral recently https://www.popularmechanics.com/science/math/a28569610/viral-math-problem-2019-solved/ This lead me to this Why are physicists allowed to break the rules? What reasoning does the Physics Review and Feynman have for making...
  5. J

    Power loss: AC vs DC

    Intuitively I fell like AC would lose more power long a long power line than DC. I will use a model to explain my perspective. Let me model a wire as a long straight, non-frictionless tube, about the diameter of a marble, filled with a row of marbles that are each connected to the one next to...
  6. J

    Why don't birds get shocked on power lines?

    I know the answer, because they are not grounded and do not complete any circut, but I have a different analysis that I would like to explore. First, why do you need a closed circuit? Because if you have a battery pushing current along a wire that ends, electrons will accumulate at the end of...
  7. J

    Hill's law (muscle contraction speed) -- Calculations when lifting different weights

    Homework Statement https://imgur.com/a/OLPyMfK Homework Equations F=ma W=F*d W=T2 - T1 The Attempt at a Solution For part A i figured it must be E because that is the only one that goes to 0 as the hit says. but nothing about this problem makes any sense to me. Where it says "You...
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