New #physics #electrodynamics video. Calculating the force and torque on a loop of current near a bar magnet. Of course I do this two ways - first by treating the loop as a bunch of tiny wires and second using m x B and del(m dot B). #python youtu.be/GqPPqCDN7go

New #physics post - do rubber bands follow Hooke's law and act like springs? Here I use the Vernier go direct cart to collect data. medium.com/@rjallain/do...

New #physics video - magnetic vector potential. I think making a 3D visual with #python really helps. #electrodynamics youtu.be/YiJmN9xDCeI

Real World #physics - how fast would you have to run to parkour wall run the side of this curved bridge? medium.com/@rjallain/co...

Here’s my required #aroura pic from last night in #louisiana

#physics homework. Forces, pressure, area

Here's my #physics explanation of calculating the magnetic field due to a line, a loop, and a solenoid. Oh, of course #python is included. #electrodynamics rjallain.medium.com/magnetic-fie...

#physics meets #art - visualizing the magnetic field due to a solenoid with #python #vpython youtu.be/dgwz_XYJnto

New #physics #electrodynamics video - finding the magnetic field due a solenoid 3 ways: Ampere's law, Biot-Savart and #python (of course). youtu.be/nP0wecIyx2E

New #physics #python video - visualizing the magnetic field due to a loop of current. Bonus: calculating the magnetic dipole moment for #electrodynamics youtu.be/iEq-C91bMbU

New #physics video - finding the magnetic field due to a loop of current. No tricks in this derivation - but I do it again with #python (you probably knew that). #electrodynamics youtu.be/D5xrtFD3uYM

New #physics post - using a stair climber machine at the gym as a work energy homework problem. rjallain.medium.com/does-this-ex...

New #physics post - does Gauss's Law still work with dielectrics? This is basically a summary of the electric displacement field. #electrodynamics rjallain.medium.com/what-is-the-...

New #physics post - what's the maximum grade road you could ride a bike up? There are three things to consider: power, friction, center of mass. #iteachphysics rjallain.medium.com/according-to...

AAPT is pleased to announce that Rhett Allain has been selected to receive the 2026 Richtmyer Memorial Lecture Award. The award will be presented during the 2026 AAPT Winter Meeting. Read more at ow.ly/UpA350Xe7e6 #AAPTAwards #AAPTWM26

Congratulations @rhettallain.bsky.social !🎢

Immigrants Make Up More Than 30 Percent of Nobel Science Winners Since 2000 www.nature.com/articles/d41...

As a #physics blogger, am I going to be replaced by AI? Maybe someday - but that day is not today. I asked AI to make a physics diagram for circular orbits. The results weren't too good. rjallain.medium.com/can-a-i-make...

New #physics #electrodynamics video - using #python to display the electric field due to dipole water molecule. youtu.be/BmvTOyyZQpo

New #physics post - mass vs. weight and measuring them with just a rubber band. #iteachphysics rjallain.medium.com/rubber-band-...

Another look at Comet C/2025 A6 (Lemmon) from this morning. Here's three 8-minutes exposures showing its motion against the background of the stars. 🔭

New #physics #electrodynamics video - 2 different ways to find the electric field from the dipole moment. youtu.be/oy2mrY6NzPg

This #physics #electrodynamics video is for future-Rhett because he's going to forget how to make a quiver plot and contour plot due to an electric dipole. #python #iteachphysics youtu.be/cP3l6-2Z9rs

New #physics #electrodynamics video - finding the electric potential and electric field due to a dipole. #iteachphysics youtu.be/rF3R6-849Rs

#infrared cameras are fun, but also super useful. You can easily find water leaks even if a wall doesn’t look wet. Here’s a fun #physics demo

I came up with a new line that I like. We don’t do science to get stuff, we get stuff because we do science

#iteachphysics check this out!

New #physics #electrodynamics #python video - AGAIN doing the finite difference calculation of electric potential, but this time with Jupyter notebooks. Bonus: calculating the electric field. #iteachphysics youtu.be/l9_Bacoo6Mc

New #physics #electrodynamics video - solving 2d electric potential with python and a finite difference relaxation method. #iteachphysics youtu.be/BB5QZ2El1AI

New #physics video (this one is long). Using separation of variables to find the electric potential in a 2D area with boundary conditions ( #electrodynamics). Yes, 3D surface plot included at the end. youtu.be/M3RDynwsFuw

New #physics #python #electrodynamics video - showing that we can repeat the method of images for a charge near a plate with a many body problem. youtu.be/tUPKyG0QJ3w

New #physics video - analysis of a collision between a #UAP and a missile to estimate the UAP mass. #python code included (for visualization). #iteachphysics youtu.be/wFscSDiLjJk

On the NASA Mars biosignature page - I love this paragraph that subtlety asks for future funding with a totally unnecessary gives a shout out to Trump.

I couldn't help myself. I had to do a #videoanalysis of that collision between a missile and a #uap - you know, for #physics. Is momentum conserved? Can we find the mass of an orb? Well, we can try. #iteachphysics rjallain.medium.com/do-uaps-cons...

For my #electrodynamics class, I made a tutorial to help students build a #python program to solve the 1D potential boundary problem using the finite difference method. Here it is in case you find it useful. #physics #iteachphysics docs.google.com/document/d/1...

Morning coffee in #infrared

My #physics students wanted me to write up a tutorial for the 3D #python calculations for Gauss's law - here it is in case you want to use it. #iteachphysics docs.google.com/document/d/1...

Not a spoiler, but could a super powered person actually throw someThing into space? Here's my #physics analysis - with #python calculations of course. rjallain.medium.com/fantastic-fo...

Do you like awesome? Here is a #python model for #gaussslaw to visualize the flux for non-uniform surfaces. #physics #iteachphysics youtu.be/rQEBjzzYS7g

New #physics #python video - visualizing the electric flux through a cube. This is for my #electrodynamics course #iteachphysics youtu.be/KIsB4rfJ7RI

New #physics #python video - visualizing the electric flux through a cube. This is for my #electrodynamics course youtu.be/KIsB4rfJ7RI

New #physics post - we talk about the apparent weight at the equator vs. the poles, but what about all the locations in between? What if the Earth was frictionless? What would happen to all the people? #iteachphysics rjallain.medium.com/the-slippery...

#Physics Homework. Estimate the energy transferred from the water to the hurricane using the change in temperature of the water. Yes, it's just a rough estimate - but it would be fun.

Bluesky now platform of choice for science community. It's not just you. Survey says: "Twitter sucks now and all the cool kids are moving to Bluesky." (featuring @whysharksmatter.bsky.social) arstechnica.com/science/2025...

New #physics #python video - making a 3D quiver plot for electric fields in VPython. #iteachphysics youtu.be/1RZ28_H1Q-o

Here’s a boat in the swamp near #neworleans

New #physics video for my #electrodynamics course. Calculating the electric field due to point charges. It might seem simple, but it's the same thing you do for all sorts of problems. #iteachphysics. Oh, I do this in #python too. youtu.be/SqCn1xTmcxw

Thanks @billmckibben.bsky.social for this perspective: Opponents argue renewables take up too much land. The math tells a different story: 1 acre of corn for ethanol fuels an F-150 for ~25,000 miles. 1 acre of solar panels powers an F-150 Lightning for 700,000 miles. That’s not even close.

New #physics video - modeling elastics, inelastic, and plain collisions with #vpython #python youtu.be/miqlwBXxWJE

I got a nice shout out from @therealadamsavage on his @testedcom video. He was talking about the MythBusters plane on a conveyor belt episode. Alas, I didn't actually work on that episode though. Here's the clip for proof. youtu.be/XrBzjqroSHY?...