[quote=JAK;53598]The more I watch that animation, the more mesmerizing it seems. The curve highlights that the observer is oblivious to his own motion. For us, the Earth is always moving. Not only does it spin, but our orbital speed is over 65,000 MPH, and who knows the speed of our solar system as it careens around our galatic center nor the speed and motion of our galaxy in its complicated journey across the universe.
Wonderful thinking JAK:
As is typical for many galaxies, the distribution of mass in the Milky Way Galaxy is such that the orbital speed of most stars in the Galaxy does not depend strongly on its distance from the center. Away from the central bulge or outer rim, the typical stellar velocity is between 210 and 240 km/s.[24]
If my math is correct our solar system would be traveling ~ 420,000 mph. As far as our galaxy speed ????
Than there is the subatomic speed which is really fast. We won't address the speed of a proton spin, rather the equatorial speed of an electron has been speculated to be faster than light speed. Additionally, a pair of proton in a singlet state, appears to be instantaneous speed when determining their spin and opposite spin direction. This spin change in the lab is done in 0 time interval, or translated to infinite speed.
And for all this your navel is still the center of your universe.
Best,
Pat
P.S. Is it little wonder that I need my naps.


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If two opposite phase monopoles make up a dipole, then two opposite dipoles make up a quadrupole source. In a Lateral Quadrupole arrangement the two dipoles do not lie along the same line (four monopoles with alternating phase at the corners of a square). The directivity pattern for a lateral quadrupole looks like a clover-leaf pattern; sound is radiated well in front of each monopole source, but sound is canceled at points equidistant from adjacent opposite monopoles. The animated GIF at left shows the pressure field produced by a lateral quadrupole source. At the center of the pressure field you can see the quadrupole motion as the particles alternate motion in the horizontal and vertical directions. back and forth caused by the dipole motion. The regions where sound is cancelled shows up along the diagonals (where the grid motion is almost zero). Furthermore, there is a 180o phase difference between the horizontal and vertical wavefronts. 

