bob012345's latest activity
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bob012345 replied to the thread Undergrad Non-Linear Infinite Resistor Ladder.Thanks but do you agree it’s converging to an irrational number? -
bob012345 reacted to Baluncore's post in the thread Undergrad Non-Linear Infinite Resistor Ladder with
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Your spoiler is numerically correct. For each stage, you add conductivity in parallel, then resistance in series. Note that conductivity... -
bob012345 replied to the thread How good is Brian Cox as a science communicator?.One of the things that sparks public skepticism is when scientists with expertise in one area use their authority to make pronouncements... -
bob012345 reacted to WWGD's post in the thread How good is Brian Cox as a science communicator? with
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It's not viewed this way by companies that are leaving the higher- tax states like NY, CA in mass. Higher taxes , like just about any... -
bob012345 reacted to Ben vdP's post in the thread High School Why simplifying this function generates different outputs for same input? with
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As already mentioned in other posts the first function is not defined for the value 2. So they aren't entirely the same functions. But... -
bob012345 reacted to lemonfrostt's post in the thread Undergrad Descartes’ Geometry of Square Roots with
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Euclid constructs the arrangement in Book 6, Prop 13 of Elements. Book 6 Prop 13 To find the (straight-line) in mean proportion to two... -
bob012345 reacted to Baluncore's post in the thread Undergrad Soccer Ball Resistor Puzzle with
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Nerds are people too, but they are non-linear. In normal times, when a nerd stands near a group of n people, that makes n+1 people. In... -
bob012345 replied to the thread Undergrad Soccer Ball Resistor Puzzle.I see you just joined. Welcome to Physics Forums! One real benefit is that these kinds of problems help keep the mind sharp as one gets... -
bob012345 reacted to Carl Schwent's post in the thread Undergrad Soccer Ball Resistor Puzzle with
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Obligatory xkcd reference Nerd Sniping https://xkcd.com/356/ -
bob012345 replied to the thread Undergrad Soccer Ball Resistor Puzzle.To answer part b, I used Foster’s Resistance Theorem. The average equivalent resistance is ##\frac{V-1}{E}## where V and E represent the... -
bob012345 replied to the thread Undergrad Soccer Ball Resistor Puzzle.Thanks! There is a lot of interesting data in that paper. I liked the table of resistances between different vertices. You can get all... -
bob012345 reacted to Baluncore's post in the thread Undergrad Soccer Ball Resistor Puzzle with
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Two-point resistances in Archimedean resistor networks. Frédéric Perrier, Frédéric Girault. Results in Physics 36 (2022) 105443... -
bob012345 replied to the thread Undergrad Soccer Ball Resistor Puzzle.I started in a similar vein but a bit different. I drew the 2D projection of the TI modified to fit a flat x-y format. Then I drew it in... -
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I cheated by avoiding van Steenwijk’s method. Found the graph of the TI on Wikipedia, numbered all 60 nodes, then numbered all 90...

