Tensor Calculus For Physics Majors #1| Preliminary Vector Stuff part 1 Andrew Dotson 2026-09-21 | Tensor Calculus For Physics Majors #1| Preliminary Vector Stuff part 1
D-Term Determined (Finally Writing The Paper) Andrew Dotson 2023-11-30 | Pick up a screen protector and more over at PaperLike:paperlike.com/andrewdotsonA little update since trying to resolve normalization issue in my research.I've Been Stuck On This Problem For... (Vlog):youtube.com/watch?v=lTjzU2PrTBsA New Chapter of my PhD Has Begun (SCET video from last year):youtube.com/watch?v=NWQEJfWpGu4&t=1sPapers etc referenced:-Textbook referencing for exercise:Quantum Field Theory and the Standard Model (Matthew Schwartz)Book I mention about electromagnetic form factors and fourier transforms:Quarks and Leptons (Halzen and Martin)-DIS figure with hard/soft/jet functionsciencedirect.com/science/article/abs/pii/0550321387902586(will probably add more later today)
Numerical Integration with Variable Limits in Python Andrew Dotson 2023-08-17 | Today we go over how to numerically integrate a function f(x,y,z;a) using Scipy, where x, y and z are variables to be integrated over, and a is parameter. We do this for 2 cases:1) when the limits of integration are constant2) when the limits are functions of x, and y, themselves.Check the Flexispot Amazon store and get your setup! Apply code 'COMHARDESK' to get an EXTRA 5% discount on my model: amzn.to/3s5BiF2 (Comhar) US site: amzn.to/3OLQKPB Canada site: amzn.to/3KtSZVg
Ive Been Stuck On This Problem For... (Vlog) Andrew Dotson 2023-03-28 | I've been stuck on one issue of my research for quite a while now. In this video, I talk through one last idea I have to resolve the issue. Lets see how it goes.Link to cross section hyperphysics:http://hyperphysics.phy-astr.gsu.edu/hbase/Nuclear/elescat.htmlNucleon form-factors of the energy momentum tensorin the chiral quark-soliton model:arxiv.org/pdf/hep-ph/0702030.pdfSong: False AlarmsArtist: Lawrence + Jon Bellion
A New Chapter of my PhD Has Begun Andrew Dotson 2022-10-28 | Get 4 months for free on a 2-year plan here: nordvpn.com/andrewdotson. It's risk-free with Nord's 30-day money-back guarantee!In this video I talk about why I'm currently at Los Alamos National Lab (LANL), and talk about the effective theory I've been learning, Soft-Collinear Effective Theory (SCET).TMD School video lectures:youtube.com/channel/UClWP7fyB4xNRYbGLtvUXVvwDr. Iain Stewarts SCET Lecture Notes:https://ocw.mit.edu/courses/8-851-effective-field-theory-spring-2013/pages/lecture-notes/Paper calculating the Hard Matching coefficient through 1-loop QCD/SCET vertex correction (and more):arxiv.org/pdf/hep-ph/0309176.pdfZero-Bin Subtraction Paper:arxiv.org/pdf/hep-ph/0702022.pdfPaper on Jet and Soft Functions:arxiv.org/pdf/0901.3780.pdf
Universities in 2050 Be Like Andrew Dotson 2022-09-02 | Yes I will come fix your University.Get 4 months for free on a 2-year plan here: nordvpn.com/andrewdotson. It's risk-free with Nord's 30-day money-back guarantee!
Physics Memes Are Getting Better (Meme Review) Andrew Dotson 2022-07-29 | Get started with NordVPN with a 30-Day Money-Back Guarantee!:https://NordVPN.com/andrewdotsonPhysics Meme Subreddit:reddit.com/r/physicsmemesEigenchris's What is Momentum? (Joke Video)youtube.com/watch?v=jm7jVi8akcc&ab_channel=eigenchris
Lessons Learned During My PhD So Far Andrew Dotson 2022-07-15 | Start your free trial at Brilliant!:brilliant.org/AndrewDotsonToday I talk about a few mistakes I've had to (re)-learn from during my PhD in Theoretical Nuclear Physics so far.
HUGS 2022 Day 1 Livestream Andrew Dotson 2022-05-31 | Todays lectures include Nuclear Science at Jefferson Lab by Cynthia Keppel and Introduction to QCD (part 1) by Matt Sievert during HUGS 2022.All future HUGS streams will take place on the new HUGS channel:youtube.com/watch?v=KmLzpVjM1x8&t=4724sTIMESTAMPS0:00 Intro13:00 Nuclear Science at Jefferson Lab1:19:00 BREAK1:45:55 Intro to QCD 1
LiveStream: Moments of Inertia Example (Thin vs Uniform sphere) Andrew Dotson 2022-05-19 | Just your friendly neighborhood physics livestream. I wanted to go through an example showing how changing the mass distribution affects the moment of inertia.Check out the first 2 videos of my mini series on momentsPart1: youtu.be/0flh8ovhZ9kPart 2:youtu.be/k24FnV3myO4Pen Display used in video:amzn.to/3NoMnqb
Understanding Moments II: Center of Mass, Moment of Inertia, and All That Andrew Dotson 2022-05-14 | Today we cover moments of mass distributions, which allows us to define the center of mass and moments of inertia.Start your free trial at Brilliant!: brilliant.org/AndrewDotsonPart1:youtu.be/0flh8ovhZ9kThe screen I use to write on is the Gaomon PD2200:amzn.to/3l7sA2j
Fermis Golden Rule Or Something #Skit Andrew Dotson 2022-05-07 | Please point out where I'm going wrong I'm failing QM..
Understanding Moments Part 1: A Borrowed Concept Andrew Dotson 2022-04-30 | In this video I go over how we interpret moments of statistical distributions and introduce the Dirac delta function for describing discrete data continuously.The screen I use to write on is the Gaomon PD2200:amzn.to/3l7sA2j0:00 Intro0:42 Outline of Series1:40 The Dirac Delta Function11:53 Moments in Statistics18:15 0th Moments 19:04 Number vs Probability Densities22:10 1st Moments 29:14 Raw vs Central Moments32:40 Higher Order Moments34:28 In The Next Video
Fermi Problems + Interacting w/ Chat Andrew Dotson 2022-04-20 | Just your friendly neighborhood physics livestream. I wanted to work through some fermi questions, only to question why I'm getting worked so hard by fermi:/
Basically How Science Will End (Skit) Andrew Dotson 2022-04-15 | Pretty much the only reason physics hasn't been finished yet truthfully.
Questions Physics Majors Hate Being Asked | Interacting w/ Chat Andrew Dotson 2022-04-08 | Just your friendly neighborhood physics livestream. Reading both posted comments in my community tab as well as shooting the shib with people in chat.
Grabbing Physics By The Balls Andrew Dotson 2022-04-01 | No better way to kick off Testicular Cancer Awareness Month than doing some fun physics demos with balls.Learn more about Testicular Cancer:testicularcancerawarenessfoundation.orgStevens Channel:youtube.com/channel/UCFLnIJgydoxeJnn6GftgCKQ/videosDumbest in the Room Podcast w/ Me:youtube.com/watch?v=Umt8lYeQkVU&ab_channel=DumbestintheRoomLink to math behind demos available here:drive.google.com/file/d/1WHKxV8Y3eCuHEFPI5tyrf0lwSMIOZJc2/view?usp=sharing
Wow Physicists Are Such Good Listeners (SKIT) Andrew Dotson 2022-03-09 | Physicist does their best trying to listen to their friend talking business.
My Week at Nuclear Physics School (TMD School 2022) Andrew Dotson 2022-01-31 | I attend a 1 week winter school for Nuclear Physics graduate students called TMD school 2022. Follow me throughout the week and see all the interesting topics we learn about.All of the lectures can be found here (time stamps are currently being added to the videos):youtube.com/channel/UClWP7fyB4xNRYbGLtvUXVvwArxiv link to "Effective Field Theory and Matching in Non-Relativistic Gauge Theories":arxiv.org/abs/hep-ph/9703298
TMD Nuclear Physics School 0: The Program Andrew Dotson 2022-01-06 | Today I go through the program provided for the TMD Winter School hosted by the TMD Collaboration. I talk a bit about various interesting objects in nuclear physics, including the Transverse Momentum Dependent Distribution (TMD).TMD School Info:newmexicoconsortium.org/2022-tmd-winter-schoolOn the HUGS Program:jlab.org/conference/hugs2021
You Laugh You Physics ft. @PapaFlammy69 Andrew Dotson 2021-12-11 | Today Flammable Maths and I send each other some maths/physics memes to settle the score on who's the biggest loser, and he pulls out all the stops to convince us it's him. If one of us laughs at the other persons meme, we then have to solve a physics problem.Check out Flammable Maths part: You Laugh You Math:youtube.com/watch?v=ZpBWdzS-I7g&ab_channel=FlammableMaths
Dealing With Low Motivation Studying Physics Andrew Dotson 2021-12-09 | Today I address the common feeling of low motivation while studying physics. Go to https://NordVPN.com/andrewdotson to get a 2-year plan plus an additional month with a huge discount!
How to be a Successful Physics Major (Skit) Andrew Dotson 2021-10-25 | Dr. Bill Belichegg shares some insight on how to be the best physics major!Go to https://NordVPN.com/andrewdotson to get a 2-year plan plus 4 additional months with a huge discount.0:00 Intro0:46 Intellectual Dominance2:18 Interdepartmental Dominance2:57 Checking Your Work3:05 Time Management5:03 Mastering Physics5:39 Thoughtful Answers
Finally Taking Quantum Field Theory 1 Andrew Dotson 2021-10-18 | It's been 2 years since I've taken Quantum Field Theory II and now I'm finally taking part 1. I talk about how I'm approaching the class and how its going!
String Theory Live Stream (2) Andrew Dotson 2021-08-26 | Going through the first chapter of David Tongs String Theory lecture notes:damtp.cam.ac.uk/user/tong/string.html
String Theory Live Stream Andrew Dotson 2021-08-15 | Going through the first chapter of David Tongs String Theory lecture notes:damtp.cam.ac.uk/user/tong/string.html
Why I Want to Learn String Theory Andrew Dotson 2021-08-09 | I recently put out a post asking for resources for learning string theory. Today I talk about a couple reasons why I'd like to learn it.David Tongs Lecture Notes:damtp.cam.ac.uk/user/tong/string.htmlIf you'd like to become a Patron:patreon.com/andrewdotson
Im A Physicist and Flat Earther (Skit) Andrew Dotson 2021-07-08 | Dr. Ed Iotte of University College Collegiate explains why he can be both a physicist, and a flat earth believer.
Nuclear Physicists Answer Your Questions Andrew Dotson 2021-07-02 | Today I'm again joined with Caleb Fogler, Astrid Hiller-Blin, Jingyi Zhou, Daniel Adamiak, and Filip Bergabo from the Hampton University Graduate School (HUGS) program for nuclear physics where we answer some of the questions you left for us about nuclear/particle physics.0:00 Intro1:14 Is ANL good for theorists2:24 Difference between nuclear/particle physics5:39 Computation in nuclear physics10:17 The Madala Boson11:49 How well is nuclear phys understood?15:19 CV advice18:03 How do you know what equations to use?20:20 What were you asked in Gradschool Interviews?23:15 How far from nuclear fusion24:08 Prospects of machine learning in nuclear phys26:40 Is Charmedness a quantum number27:18 Proton Size Problem28:10 Use of Deeply Virtual Compton Scattering29:10 What's the next big thing in nuclear physics?
Talking with Nuclear Physicists Andrew Dotson 2021-06-21 | Today I speak with some nuclear physicists I met during my HUGS summer school. I learn about their research, and have nice discussions about what's at the frontier of nuclear physics. To find out more about HUGS nuclear physics summer school:jlab.org/conference/hugs20210:00 Introduction 1:36 Jingyi Zhou- Neutron Polarizability6:36 Filip Bergabo- Color Glass Condensate11:17 Caleb Fogler- Pion Production12:56 Aspects of Exp. Nuclear Physics16:33 Astrid Hiller Blin- Nucleon Structure/ Exotic Hadrons19:55 Non-perturbative Calculations22:10 Synergy between Exp. and Theoretical Physics24:33 Daniel Adamiak- Proton Spin Puzzle28:13 Arun Tadepalli- OAM Distributions/ Nucleon Form Factors31:03 Transition into Graduate Research
Nuclear Physics Summer School Vlog Ep. 3 (HUGS 2021) Andrew Dotson 2021-06-09 | I start the second week of the Hampton University Graduate School (HUGS) program for nuclear physics. I attend lectures on how to prepare a CV, Gluons in QCD, and more!Check out the full lectures:youtube.com/watch?v=_AnwTEuCRuM&ab_channel=ODUREYESODUREYESand the ODU REYES Channel:youtube.com/channel/UC5DaSltSOMYIKoy1gu3SwzATo learn more about HUGS:jlab.org/conference/hugs2021
Ranking Famous Physics Equations Andrew Dotson 2021-06-07 | Today I rank some physics equations you might have seen before, and have some fun talking about what they mean and where they pop up. The chancellor of physics DM'd me saying this is canon now.Check out PhysicsOH's channel:youtube.com/channel/UCoJP3W_S2Vt6jhrSIv0ScMgand his twitch:twitch.tv/physicsohThe tier list:tiermaker.com/create/physics-equations-972234
Nuclear Physics Summer School Vlog Episode 2 (HUGS 2021) Andrew Dotson 2021-06-05 | Onto the second day of the Hampton University Graduate School (virtual) summer program for nuclear physics students. More QCD, I attend a social, and more!See the full lecture:youtube.com/watch?v=Rzm_6PPhRPg&t=3837s&ab_channel=ODUREYESODUREYESCheck out the ODU Reyes channel:youtube.com/channel/UC5DaSltSOMYIKoy1gu3SwzA/videosLearn more about HUGS:jlab.org/conference/hugs2021
Nuclear Physics Bootcamp Vlog (HUGS 2021) Andrew Dotson 2021-06-02 | Today was the first day of the Hampton University Graduate School (virtual) summer program for nuclear physics students. I take you through the multiple lectures I attended, including ones on Jefferson Lab (Jlab), QCD, and more.Check out the full (8 hour) lecture:youtube.com/watch?v=EPcRYGlz8v8&t=22572s&ab_channel=ODUREYESAlso check out the REYES channel :)youtube.com/channel/UC5DaSltSOMYIKoy1gu3SwzAMore info on HUGS:jlab.org/conference/hugs2021
Physics Meme Review (#1) Andrew Dotson 2021-04-22 | Today we review some of the tastiest memes that the grand unified physics memes fb page and physics meme sub reddit have to offer.Go to curiositystream.thld.co/andrewdotson for unlimited access to the world’s top documentaries and nonfiction series. Use promo code andrewdotson to get your first 30 days, completely free!GUPM FB page:facebook.com/groups/110363486480563Physics Memes Subreddit:reddit.com/r/physicsmemes
The Einstein Field Equations | Tensor Calc Finale Andrew Dotson 2021-04-15 | Today we use all the tools we've got in our back pocket to "derive" the Einstein Field Equations of general relativity. It's more of a motivation than a derivation, I suppose.This series is based off the book "Tensor Calculus for Physics" by Dwight Neuenschwander:amzn.to/3rEema3Video relating metric to gravitational potential:youtube.com/watch?v=kIi-qcSBa4w&t=69s&ab_channel=AndrewDotson Video deriving contracted bianchi identity:youtube.com/watch?v=zmWLUex-hGM&ab_channel=AndrewDotsonDeriving the Riemann Curvature Tensor:youtube.com/watch?v=L8ISLzDYl68&t=1331s&ab_channel=AndrewDotsonUniqueness of Riemann Curvature Tensor:vixra.org/pdf/1912.0357v1.pdforphysics.stackexchange.com/questions/315374/on-the-uniqueness-of-the-riemann-christoffel-tensor0:00 Intro1:40 Goal: Generalize Poissons Equation4:40 Criteria for Field Equations12:09 What Could They be in Terms of?15:13 "Guessing" the Form of the EFE's18:41 Finding the Coefficients32:23 Writing Down Einsteins Equations33:52 Important Interpretation34:04 Conclusion
The Bianchi Identities | Tensor Calculus Ep. 17 Andrew Dotson 2021-03-31 | Today we derive the differential and contracted Bianchi Identities.Video relating metric to gravity (newtonion limit):youtube.com/watch?v=kIi-qcSBa4w&t=69s&ab_channel=AndrewDotsonDeriving the Riemann Curvature Tensor:youtube.com/watch?v=L8ISLzDYl68&t=1348s&ab_channel=AndrewDotsonThis series is based off the book "Tensor Calculus for Physics" by Dwight Neuenschwander:amzn.to/3rEema30:00 Intro1:59 Definitions and Symmetries4:59 Riemann Tensor in Local Inertial Frame7:10 Deriving the Differential Bianchi Identity15:26 Deriving the Contracted Bianchi Identity25:38 Final Comments
Relating Metric Tensor to Gravity | Tensor Calculus Ep. 16 Andrew Dotson 2021-03-19 | Today I show how in the Newtonian limit, we're able to relate the metric tensor to the gravitational potential. We do this by imposing a static weak field metric, and see how this affects the geodesic equation. This will be one of many useful pieces of information we can use to argue what Einstein's Field Equations will be.This series is based off of the book "Tensor Calculus for Physics" by Dwight Neuenschwanderamazon.com/gp/product/1421415658/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1421415658&linkCode=as2&tag=andrewdotson-20&linkId=b45243268a957a6cfdfc854a8f677a580:00 Introduction1:50 Geodesic Equation3:20 Newtonian Limit5:40 Static Weak-Field Metric12:30 Comparing Geodesic Equation with Free Fall Equation15:05 Relating the SWF Metric to Gravitational Potential15:42 Final Comments and Conclusion
Tensor Calculus Ep. 15 | Riemann Curvature Tensor Andrew Dotson 2021-03-13 | Todays episode explores the concept of curvature, and we finally arrive at the Riemann Curvature Tensor.Eigenchris's video:youtube.com/watch?v=-Il2FrmJtcQ&t=1364s&ab_channel=eigenchrisThis series is based off of the book "Tensor Calculus for Physics" by Dwight Neuenschwanderamazon.com/gp/product/1421415658/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1421415658&linkCode=as2&tag=andrewdotson-20&linkId=b45243268a957a6cfdfc854a8f677a580:00 Introduction1:45 Extrinsic/Intrinsic Curvature6:32 Parallel Transporting Vector11:32 Derivatives as Generators of Translation14:50 Commutator of Covariant Derivatives32:46 The Riemann Curvature Tensor35:49 RCT Analogy to Intro Calculus37:08 Do Cylinders have Intrinsic Curvature38:24 2-D Sphere vs 3-D Euclidian Metric in Spherical Coordinates40:25 Next Videos and Conclusion
Doing a Giveaway and @PapaFlammy69 Christmas Present Andrew Dotson 2021-02-23 | I wanted to announce a giveaway that I'm doing for a highschool/first year physics major and one for my lvl 12 tensor boi/grill supporters on patreon.I also open a neat little gift from papa flammilious. His channel:youtube.com/channel/UCtAIs1VCQrymlAnw3mGonhwYou can become a patron at:patreon.com/andrewdotson
Basically How Physics Exams are Made Andrew Dotson 2021-02-18 | Today Dr. Lawrence N. Varence enlightens us on how to make the perfect physics exam.Visit http://www.audible.com/andrewdotson or text "andrewdotson" to 500 500" to start a free 30 day trial at audible!
What to Expect as a Physics Gradstudent | Year 1 and 2 Andrew Dotson 2021-02-12 | Today I go over some key aspects of a physics masters/phd program that you can expect during your first two years of the program. I also give some unsolicited advice throughout.Making a google calendar for classes:youtube.com/watch?v=RRSsU4ove5E&ab_channel=AndrewDotsonQualifying exam video:youtube.com/watch?v=iBvm6RCISO8&t=292s&ab_channel=AndrewDotsonComprehensive exam video:youtube.com/watch?v=naJPkXO2azA&t=87s&ab_channel=AndrewDotsonIf you'd like to support the channel more:patreon.com/andrewdotson0:00 Introduction1:19 Courses3:38 Funding5:16 Workload8:47 Grades10:45 Qualifying Exams12:26 Research
Particle Physicist Takes General Relativity #shorts Andrew Dotson 2021-01-28 | Particle physicists walks into a lecture on general relativity. What happens next might surprise you. Or it won't. Either way it's 10 seconds.#shorts
Physics/Astrophysics Gradstudent Live QnA ft. Ibrahim Chahrour and Kyle Kabasares Andrew Dotson 2021-01-20 | Today I'm joined with Particle Physics gradstudent Ibrahim Chahrour and Astrophysics gradstudent Kyle Kabasares. We talk gradschool, research, and answer some of your questions. Ibrahims Channel:youtube.com/channel/UCknVDqqAp6hnQwGYfQrZCGAKyles Channel:youtube.com/user/KMKPhysics3
Books I Use For Research in Theoretical Nuclear Physics Andrew Dotson 2021-01-13 | In this video I go over the books I find myself commonly referencing while doing my research in theoretical nuclear/particle physics. How crazy would it be if you became a patreon supporter xD omg are you really doing this:patreon.com/andrewdotson
You Laugh You Differentiate pt. 2 @PapaFlammy69 Andrew Dotson 2020-12-25 | Part 2 of me and the Boi settling the score once and for all (until next time). I sent Flammable Maths some math memes, he sent me some physics memes. If we laugh, we have to differentiate .Part 1:youtube.com/watch?v=XlcuEEVQfog&ab_channel=AndrewDotsonYou Laugh You Integrate:youtube.com/watch?v=7zgCl9j-SjA&t=1496s&ab_channel=FlammableMathsIf you'd like to become a Patreon supporter:patron.com/andrewdotson
I Gave My Ph.D. Thesis Proposal/Oral Exam Andrew Dotson 2020-12-17 | The last exam a physics graduate student at NMSU has to take before officially beginning their dissertation is the Oral Exam where they present their research topic. The time came for me to give mine, and here's how it went.Video on qualifying exam:youtube.com/watch?v=iBvm6RCISO8&t=292s&ab_channel=AndrewDotsonVideo on written portion of Comprehensive Exam:youtube.com/watch?v=eXlnexz8J4Y&t=28s&ab_channel=AndrewDotsonWant to become a patreon supporter?patreon.com/andrewdotson
You Laugh You Differentiate pt.1 | ft @PapaFlammy69 Andrew Dotson 2020-12-15 | Meme war between myself and Flammable Maths! Signup for your FREE trial to The Great Courses Plus here: http://ow.ly/iSPr30rnpK0List of derivatives:researchgate.net/publication/347241057_Garbage_Differentials_for_the_sophisticated_MemerPart 1 (You Laugh You Integrate):youtube.com/watch?v=7zgCl9j-SjA&ab_channel=FlammableMathsCheck out Flammable Maths Channel: youtube.com/channel/UCtAIs1VCQrymlAnw3mGonhw
The Anatomy of a Feynman Diagram | on the Gaomon PD2200 Andrew Dotson 2020-11-26 | You've probably heard of /seen Feynman Diagrams before, but what exactly do they stand for and what make them up? In this videos I try to answer that question. Take advantage of the Gaomon sales through November 29th!GAOMON Black Friday Week SALEPD2200 - 21.5'' 373.99USD Black Friday Deal--15% OFFUS: bit.ly/US_PD2200 November 23 to 29PD1560 - 15.6'' 237.99USD Black Friday Deal--34% OFFUS: bit.ly/GAOMONUS_PD1560November 23 to 29PD1161 - 11.6'' ON SALE 169.99 Black Friday Deal--29% OFFUS: bit.ly/GAOMONUS_PD1161 November 23 to 29PD1561 -15.6'' 339.99USD ON SALE US: bit.ly/GAOMONUS_PD1561PD156PRO -15.6'' ON SALEamazon.com/dp/B08FXD2V9Famazon.com/dp/B07ZZ4J7QRGAOMON Non-Screen Pen TabletsS620: bit.ly/GAOMONUS_S620 33.99USDM106K: http://bit.ly/GAOMONUS_M106K 47.99USD 20% OFFnewegg.com/GAOMONFlammable Maths review of the PD 2200 (Starts at 23:05):youtube.com/watch?v=vTJBZ8ujTek&t=1385s&ab_channel=FlammableMathsA dedicated pd2200 review:youtube.com/watch?v=mkDK2oAHJUk&t=377s&ab_channel=Krystaliaaa
Week as a Theoretical Physics Student | Covid PHLOG Andrew Dotson 2020-11-19 | Just an ordinary week as a Ph.D. student in theoretical nuclear physics at NMSU while the worlds on fire. How bout yours?Take advantage of Ekster's Black Friday Sale (up to 40% off):https://ekster.com?sca_ref=444079.KqW9vMIq7hBecome a patreon supporter:patreon.com/andrewdotsonCool online physics labs:https://phet.colorado.edu/en/simulations/filter?sort=alpha&view=grid
