lilgreenland

11 ms·

1. 61.▲
   by lilgreenland 7y ago

   Nope! It's kinda silly. We all call electrons negative because of how they were labeled 250 years ago. If he had labeled them positive the math involving electric current would be a bit easier. https://xkcd.com/567&#
2. 62.▲
   by lilgreenland 7y ago

   Here's my take on a cartoony conductivity simulation. I've got three models: conductors, semiconductors, and semiconductors but with holes. https://landgreen.github.io/physics/notes/electromagnetism&#x2F
3. 63.▲
   by lilgreenland 7y ago

   I teach high school physics. Here's my notes/textbook on electricity with simulations and equations rendered in LaTex. https://landgreen.github.io/physics/notes/circuits/electrici...
4. 64.▲
   by lilgreenland 7y ago

   Same. I run a CO2 monitor in my classroom too. It gets up to 2000ppm very fast without the fan on.
5. 65.▲
   by lilgreenland 8y ago

   Same, I find I don't need to go to Stack Overflow because MDN has good documentation.
6. 66.▲
   by lilgreenland 8y ago

   Any thoughts on Leapfrog integration? I've got a super basic n-body simulator that I'm using for gravity and for coulomb's law. I also need to advance to adaptive time steps. https://landgreen.github.io/physi
7. 67.▲
   by lilgreenland 8y ago

   There is a portal for everything... https://scratch.mit.edu/projects/43690666/
8. 68.▲
   by lilgreenland 8y ago

   They passed a law in CA a few weeks ago. All urban public schools must begin no earlier than 8:30 a.m. https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml...
9. 69.▲
   by lilgreenland 8y ago

   The neutron stars were orbiting each other very fast to make the gravity waves. After they collided the gravity waves stopped and light waves were produced.
10. 70.▲
    by lilgreenland 8y ago

    Mass is a type of energy. This means that inertia is dependent on energy not mass (I think). Converting some mass to energy would still require the same force to accelerate.
11. 71.▲
    by lilgreenland 8y ago

    Hey my sims worked! You got it, although I'd add in that only the free electrons can move around like the ones in the outer valence of metals.
12. 72.▲
    by lilgreenland 8y ago

    If I had to do it over a Jupyter notebook might be cool. It would make the graphing and equations easier. Although, I think simulation graphics are probably better with html5 js canvas.
13. 73.▲
    by lilgreenland 8y ago

    thanks! When I wrote that line I think I went with the top result of physics.stackexchange, but I'm now convinced that the phase velocity explanation is better. Here is my updated text: <p>While individual waves of light always
14. 74.▲
    by lilgreenland 8y ago

    thanks! This is great! I'm going to work on implementing these changes. The context.getImageData() might enable me to improve some other simulations as well.
15. 75.▲
    by lilgreenland 8y ago

    I tried MathJax, but it added a half second render time, Katex loaded instantly.
16. 76.▲
    by lilgreenland 8y ago

    My Coulomb's law simulation is classical only, no quantum physics. I hope it has some value in showing emergent phenomena. Electrons can just leave the atom, this is how static electricity works.
17. 77.▲
    by lilgreenland 8y ago

    :)
18. 78.▲
    by lilgreenland 8y ago

    Cool!
19. 79.▲
    by lilgreenland 8y ago

    I'm not that knowledgeable on friction. Do you think the friction equations are OK for high school level physics? Would you say that this is accurate? "Kinetic friction is primarily caused by chemical bonding between surfaces; how
20. 80.▲
    by lilgreenland 8y ago

    That's a good idea. My current solution is to just try and make every page awesome, but I know some sections have more love than others.
21. 81.▲
    by lilgreenland 8y ago

    The sine wave simulation is my poor attempt at letting the students discover the equations. My hope is that they will discover the wave equation and the inverse relationship between period and frequency.
22. 82.▲
    by lilgreenland 8y ago

    I'm adding this here as a part of my growing todo list: Add in more explicit unit analysis problems to each unit. Add in unit tracking to more solutions.
23. 83.▲
    by lilgreenland 8y ago

    This Cal Tech style sounds neat. Let me know if you know more, I couldn't find anything on google. HA, I'm so inconsistent with my spaces on units. I'll add that to my summer todo list.
24. 84.▲
    by lilgreenland 8y ago

    Any time you have to explain some to someone else you can't lie to your self about how much you understand. Also, I think the simulations can help one understand some of the emergent properties that come from physics principles.
25. 85.▲
    by lilgreenland 8y ago

    Thats an interesting point. I think high school physics teachers are split on units. I'm willing to change teams. The argument for just showing units at the end is that students who are just starting to master algebra have trouble wit
26. 86.▲
    by lilgreenland 8y ago

    MOSTLY, thats great! sigh
27. 87.▲
    by lilgreenland 8y ago

    I like this one on wave propagation. https://landgreen.github.io/physics/notes/waves/waves/index.... (it's at the very bottom)
28. 88.▲
    by lilgreenland 8y ago

    Good idea, I'll add in a section for teachers over the summer. I might link to some of the labs and worksheets.
29. 89.▲
    by lilgreenland 8y ago

    That's my favorite simulation so far, but I also like the one on wave propagation.
30. 90.▲
    by lilgreenland 8y ago

    Yep I enjoy hand writing the SVG, it makes recycling sections a bit easier.