Skip to comments.Researchers Find Source of Strange 'Negative' Gravity
Posted on 08/13/2018 3:41:56 PM PDT by plain talk
Sound has negative mass, and all around you it's drifting up, up and away albeit very slowly.
That's the conclusion of a paper submitted on July 23 to the preprint journal arXiv, and it shatters the conventional understanding that researchers have long had of sound waves: as massless ripples that zip through matter, giving molecules a shove but ultimately balancing any forward or upward motion with an equal and opposite downward motion. That's a straightforward model that will explain the behavior of sound in most circumstances, but it's not quite true, the new paper argues.
A phonon a particle-like unit of vibration that can describe sound at very small scales has a very slight negative mass, and that means sound waves travel upward ever so slightly, said Rafael Krichevsky, a graduate student in physics at Columbia University.
(Excerpt) Read more at livescience.com ...
Leave now, or can I at least let Ms. Onona know ?
The dark matter was sucked into a black hole by negative gravity.
Wheres my Nobel Prize?
That looks like PacMan’s grampa.
So, ladies and gentlemen, the next time you have to stand on a scale, just start singing really loud.
Thats the trick.
Now we know why Flying Saucers hum like that - it’s anti-grav!
I wish there was a science gambling site. I would bet big on this theory dying soon.
First off--how can *anything* have *negative* mass?
Second, perhaps the slight upward travel of sounds waves doesn't actually exist--it's just that sound does not follow the curvature of the earth, so it just *seems* like it's rising.
Third--this is a graduate student we're talking about here, and his "findings" are given this much consideration?
From the description, it sounds (no pun intended) like something analogous to the Bernoulli effect.
If this paper is true, you may be onto something.
I disagree with the theory. The older I get, gravity gets heavier and heavier.
Wheres my Nobel Prize?
Not so fast blue.
Dark matter is matter that travels faster than the speed of light. -Eddie01 '18
The “negative mass” is an apparent, not a real, property due to a phenomenon similar to how the Bernoulli effect contributes to the lifting force on an aircraft wing.
Perhaps—but that’s not what the article said.
Lol! No matter how that strange little guy did it, for his “sweet sixteen”, it’s amazing. Like a small-scale version of the pyramids mystery. Well, something like it anyway.
Yeah. My butt suffers from positive gravity. When I get close to my recliner its gravity pulls it right into a collision course.
It said it in a different way, by speaking of the effects of the sound waves themselves on the density of the substance through which they travel. By reducing the density of the substance above in a gravity field, the sound wave induces its own (slight) upward travel. This must be something very slight, or we’d already know about it in standard acoustics.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.