iiinova — where your digital self keeps evolving

Dan Hosey @danhosey.bsky.social · 01/11/2025

I made an excel spreadsheet that scores a cross country meet. It also allows you to rescore the meet by entering "Fictional Order" to see how the xc results would change. It's a lot of fun youtu.be/UIcG5tnKWv8

youtu.be

Spreadsheet for Scoring and Simulating a Cross Country Meet

YouTube video by PrerequisiteName

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Dan Hosey @danhosey.bsky.social · 23/10/2025

Playing with iterating through preset parameters for a @desmos simulation. A table of values makes it easy to cycle through different scenarios. This particular sim is for equilibrium of a rod supported by a cable. www.desmos.com/calculator/b...

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Dan Hosey @danhosey.bsky.social · 14/10/2025

#iTeachPhysics Playing with @desmos.com 3d, exploring spherically symmetric charge distributions where p(r)=r^n. Vary n and watch the charge distribution change in 3d. p(r),Q_enc(r),E(r) graphed on XY plane. Toggle each octant on and off by clicking large corner Pts. www.desmos.com/3d/wmp7fkjdyh

desmos.com

[DH-125] 3d Spherical Charge Distribution

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Dan Hosey @danhosey.bsky.social · 12/10/2025

Just playing around some more with Desmos 3d. Specifically Spherical Coordinates and octants. Points generated randomly. Click single dots to hide Octants. Change Vector in Spherical Coordinates. Just for fun ... www.desmos.com/3d/bkcwfvungl

desmos.com

Spherical Coordinate and Octant Play

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Dan Hosey @danhosey.bsky.social · 16/03/2025

#iTeachphysics Noticed 2 sets of reflection in my reading glasses of the 4 candelabra lights above my kitchen table. One set is of the 4 white bulbs I expect. The other reflection makes the bulbs blue. Another pair of glasses makes the 2nd reflection green. Any thoughts on what is going on?

Reading glasses held in my hand, showing 2 sets of reflections of the 4 lightbulbs above my dining room table. The pendant style small chandelier has 4 white candelabra shaped bulbs. In the reflected image we see a set of 4 white bulbs and a second set of 4 green bulbs. What do you think is going on?

A different pair of Reading glasses held in my hand, showing 2 sets of reflections of the 4 lightbulbs above my dining room table. The pendant style small chandelier has 4 white candelabra shaped bulbs. In think the reflected image we see a set of 4 white bulbs and a second set of 4 BLUE bulbs. What do you think is going on?

The pendant style small chandelier has 4 white candelabra shaped bulbs.

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Dan Hosey @danhosey.bsky.social · 20/02/2025

#ITeachPhysics I've been working on an electrostatics @desmos.com simulation to build up student intuition for parallel plate capacitors including a partial dielectric. I am a little too close to it right now, does this simulation make sense to others? www.desmos.com/calculator/o...

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Dan Hosey @danhosey.bsky.social · 06/01/2025

I forgot I previously made this SHM @desmos.com comparing UCM, pendulum, and mass on a spring side by side until I was getting ready for class this evening. #iTeachPhysics www.desmos.com/calculator/e...

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Dan Hosey @danhosey.bsky.social · 19/12/2024

Modeling a figure skater as a solid disk with 'very light' arms and 'very massive' hands in @desmos.com www.desmos.com/calculator/w... #iTeachPhysics

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Dan Hosey @danhosey.bsky.social · 12/12/2024

#iteachphysics tweaking a @desmos.com simulation for making sense of an object rolling up, then down a hill. Frictionless and frictionfull incline side by side. Also, looking at the transition of an object with backspin to forward under a new rolling condition. www.desmos.com/calculator/r...

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Dan Hosey @danhosey.bsky.social · 10/12/2024

#iTeachPhysics When introducing Parallel axis theorem,I show part of the Coin Paradox Veritasium video about an incorrect SAT question.I use this #desmos simulation to relate the "extra" rotation to the CM orbiting a parallel axis. youtu.be/FUHkTs-Ipfg?... www.desmos.com/calculator/2...

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Dan Hosey @danhosey.bsky.social · 10/12/2024

Playing around making an adjustable pace chart for indoor / outdoor track #running www.desmos.com/calculator/n...

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Dan Hosey @danhosey.bsky.social · 25/11/2024

Playing around with coefficient of restitution and 2 bouncy balls simulation. www.desmos.com/calculator/a... #iTeachPhysics

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Dan Hosey @danhosey.bsky.social · 17/11/2024

#iTeachPhysics 20 classroom physics experiments in 60 seconds. Each uses textbooks. Started as a joke, became a nostalgic dive through my personal archives. How many do you recognize? Which are new? Post pictures of your using textbooks for something other than reading. youtu.be/jcS6jjMCStA

youtu.be

20 Physics Experiments in 60 seconds. Each uses textbooks.

YouTube video by PrerequisiteName

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Dan Hosey @danhosey.bsky.social · 17/11/2024

#iTeachPhysics 20 experiments in 60 seconds. This started with a joke about using textbooks in lab. I went through my files and all 20 use textbooks. How many do you recognize? How many are new to you? Maybe I just want BlueSky to be the new physics teaching place. Post your textbook pictures...

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Dan Hosey @danhosey.bsky.social · 15/11/2024

#iteachphysics Investigating the Tension in a pendulum and release angle. Graphing Tension vs Cos(theta) produces a line with a slope of -2mg and y-intercept of 3mg. What is another linearization where a quantity shows up in the slope and intercept? g. www.dropbox.com/scl/fo/v2svb...

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Dan Hosey @danhosey.bsky.social · 14/04/2024

Despite 100% overcast sky, I was able to capture the staggering speed of totality darkness Check out these graphs. #iteachphysics Perception of brightness is not linear. I also used this concept to modify the the Desmos sim of totality my student made. www.desmos.com/calculator/h...

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Dan Hosey @danhosey.bsky.social · 27/10/2023

#iteachphysics 3D Desmos simulation of a banked turn. Vary radius of turn to see how the normal and friction forces change. www.desmos.com/3d/242372468a

desmos.com

Banked Turn 3d C

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Dan Hosey @danhosey.bsky.social · 06/10/2023

3D @Desmos simulation of many large angle Pendula. Presets for 1. "Wave Snake". 2. Simultaneous release from 0 to 180 degrees. 3. "Meter Stick Falling Race.". (Physical Pendulum) youtu.be/cWnZLJQlajA desmos.com/3d/4cad37dccd #iteachphysics

youtu.be

Desmos 3D simulation of many large angle Pendula

I am having so much fun with desmos 3D. I made a simulation of N simultaneously released pendula. The motion is computed numerically using at Runge-Kutta a...

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Dan Hosey @danhosey.bsky.social · 30/09/2023

#Physics Desmos 3D calculator just came out in beta form. Having some fun playing with multiple conical pendula at varied speeds. desmos.com/3d/4c463a918b

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