Modeling the Cavendish Experiment with Python

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  • เผยแพร่เมื่อ 29 ต.ค. 2024

ความคิดเห็น • 9

  • @teenspirit1
    @teenspirit1 10 หลายเดือนก่อน +2

    This is the best channel on youtube.

    • @DotPhysics
      @DotPhysics  10 หลายเดือนก่อน +1

      thanks!

  • @fizixx
    @fizixx 10 หลายเดือนก่อน +1

    Terrific, thank you.

  • @Rafid_Ahmed101
    @Rafid_Ahmed101 8 หลายเดือนก่อน +1

    I just love this channel

    • @DotPhysics
      @DotPhysics  8 หลายเดือนก่อน

      thanks!

  • @declanwk1
    @declanwk1 4 หลายเดือนก่อน

    Just for fun, if you go to : "The Force of Gravity. Cavendish Experiment" uploaded by DaveZ, th-cam.com/video/VYf-Glwtr68/w-d-xo.html
    you can calculate a value for G (I calculate G=4.5E-11) by estimating the variables in the video by eye (all SI units):
    m1=43kg, 30cm cubed box, density of sand is 1.6
    m2=0.5kg, looks to be a half liter bottle of water
    r= 0.03 m, estimated radius of the small mass m2
    T=12*60=720seconds (period of the pendulum, which he says in the video is 12 minutes)
    L=4 m (distance from mirror on balance to the wall, estimated)
    ds=0.14 m (total deflection of the light spot, the piece of paper that the light was projected onto seemed to be A4, which is roughly 30cm long )
    b=0.15m (distance from center of the box of sand to the center of the bottle of water, ie half of the width of the box
    d=0.5 m (distance from axis of balance to center of bottle of water)
    mrod=0.087kg , weight of a similar meter stick
    The following parameters are then calculated:
    Moment of inertia of the balance I=2(2/5*m2*r^2 + m2*(d/2)^2 )+(1/12*mrod*d^2)=0.06466525
    Spring constant k deduced from the period of oscillation. k=(4pi^2*I)/(T^2)= 4.93e-06
    Angle of deflection theta=ds/4L=0.00875
    Then G=(k*theta*b^2)/(2*d*m1*m2)=4.5E-11

  • @riccvven2078
    @riccvven2078 10 หลายเดือนก่อน

    Hope you'll read it; Hello, i just started python but i found out that to study cfd i need openfoam and c++
    This killed me cause i'm forced to study i new language + program from 0; will you ever make something with c++ or a cool video on some cfd study with python? Even really easy or how to implement python with c++ based program

    • @DotPhysics
      @DotPhysics  10 หลายเดือนก่อน +1

      I probably won't do any c++. For me, it's all about the physics. I just use python as a way to explain the important physics concepts and numerical calculations.

    • @riccvven2078
      @riccvven2078 10 หลายเดือนก่อน

      @@DotPhysics what about a fluiddynamic simulation with python?