References: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Chapter 11, Post 21. Here’s another example of radiation from an accelerated charge. We hang a spring with spring constant from the ceiling and attach a particle of mass and charge to its lower end, which has an equilibrium distance of above […]
Are you a good teacher or a bad one?Image by Gillian (?)STOP! It's a trick question. Loaded.If you say good, you're arrogant, you don't understand how good teachers are always trying to get better, you're not aware of your faults or you're just blind to the signs.If you say bad, you buying into some kind of talent argument, ignoring growth mindset principles, falsely humble, don't even know what formative assessment or SBAR means or, worse, you're guilty of one of the big teacher sins like low […]
From the Census Bureau via Slate, on the income gaps between opposite-sex married couples: in 3.9 percent of couples, the husband earns 5,000 to 9,999 more dollars (per year) than the wife; in 25.4 percent of couples, the husband earns … Continue reading →
On Friday, we reported on the retraction and republication of a paper in The Lancet. One of the paper’s authors, Yale’s Harlan Krumholz, took issue with how we characterized the reason for the retraction. We offered him a chance to write a guest post about the situation, which we are pleased to publish below. Please […]The post Retraction Watch “mischaracterized the reason for a retraction:” Harlan Krumholz responds to a post appeared first on Retraction Watch.
From futility closet, pointing to this entry in the Encyclopedia of Integer Sequences: numbers such that divides the number of digits of are: 1, 22, 23, 24, 266, 267, 268, 2712, 2713, 27175, 27176, 271819, 271820, 271821, 2718272, 2718273, 27182807, … Continue reading →