SOS, how is this possible?  Scientists created a fluid with negative mass. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: November 15, 2018, 05:09:33 pm
content: Scientists have created a fluid with negative mass?QuoteIE, you push on the fluid forward, said fluid accelerates toward you in reverse...How is this possible?Article:https://www.theguardian.com/science/2017/apr/19/scientists-have-created-a-fluid-with-negative-mass-but-what-does-it-tell-usQuoteArticle2:https://phys.org/news/2017-04-physicists-negative-mass.html

author: Tomorokoshi
author_rank: Super Contributor
timestamp: November 15, 2018, 05:23:45 pm
content: First Kirchhoff's Laws, and now Newton's? What's next? Changing the Volt and the Kilogram?

author: bd139
author_rank: Super Contributor
timestamp: November 15, 2018, 05:34:49 pm
content: https://www.cnet.com/news/scientists-are-about-to-redefine-how-much-a-kilogram-weighs/

author: tpowell1830
author_rank: Frequent Contributor
timestamp: November 15, 2018, 05:38:47 pm
content: So, is this fluid trying to accelerate away from earth at a rate of 9.8m/s/s?

author: tggzzz
author_rank: Super Contributor
timestamp: November 15, 2018, 05:44:48 pm
content: You have a helium balloon in a car moving forwards. The car decelerates.Which way does the balloon move?Ditto a balloon filled with carbon dioxide?

author: BrianHG
author_rank: Super Contributor
timestamp: November 15, 2018, 05:46:34 pm
content: Quote from: tpowell1830 on November 15, 2018, 05:38:47 pmAccording to the end of the first article I listed, No. Remember, gravity doesn't push or pull on objects, it's the objects just following the curvature of space-time itself. Maybe in the case of artificial gravity due to acceleration, or rotation in spin gravity, having this fluid supported on a surface or platform which may be accelerating or rotating may cause a weird effect.Quote

author: tpowell1830
author_rank: Frequent Contributor
timestamp: November 15, 2018, 05:51:51 pm
content: Quote from: BrianHG on November 15, 2018, 05:46:34 pmDo you mean like the earth (rotating, moving through space)?

author: BrianHG
author_rank: Super Contributor
timestamp: November 15, 2018, 05:57:28 pm
content: Quote from: tpowell1830 on November 15, 2018, 05:51:51 pmNo, like Babylon5 space station. The internal gravity is artificial due to rotational centrifugal force even though there is no planet anywhere. You feel gravity on that space station since you stand on the inside of a huge rotating cylinder where you are being pushed towards the outer edge as it rotates holding you to it's surface. Hence, without a huge planet, you have artificial gravity. (Yes, this is real physics though the TV show was fictional)I'm saying a negative mass fluid siting on the internal surface of this space station would not behave the same way as all other matter. My guess is that it either would be double weight, or, keep bouncing off, flowing in reverse to rotation from the surface in an ever growing accelerating fashion.

author: BrianHG
author_rank: Super Contributor
timestamp: November 15, 2018, 06:07:57 pm
content: Quote from: tggzzz on November 15, 2018, 05:44:48 pmLooks like you've created a sort of equivilant effect with the helium balloon being lighter than the surrounding air.Your example is such a simple explanation, I wonder why the physicists didn't use your analogy.I'm having difficulty applying this to a push on the fluid in a vacuum where the push to the fluid is like: (Actual Quote) “It looks like the rubidium hits an invisible wall.”

author: SiliconWizard
author_rank: Super Contributor
timestamp: November 15, 2018, 06:13:56 pm
content: Quote from: bd139 on November 15, 2018, 05:34:49 pmYes, spot on. This is a work currently in progress.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 15, 2018, 06:57:40 pm
content: It's not possible. It's a lie to attract clicks.A BEC is about as far removed from common experience as you can get.Calling it a "fluid" in that sense, is precisely as disingenuous as any reporting on quantum physics inevitably is.Basically they've created a system that exhibits negative group velocity, an unusual but not unheard of condition, say with electromagnetic fields. It's just been done with condensed fermions, which pair up to form a bosonic state, where the same boundary conditions can be applied to give the same result. (Extrapolating from my knowledge of these things, anyway. Read the paper if you need the actual theory.)Tim