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

#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?

#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...

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...

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

#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...

#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...

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

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

#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

#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...

#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...

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...

#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

#iteachphysics Examining critical angular velocity of objects on a rotating rod. youtu.be/3GcPUuvgcK8?...

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

#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