US Air Force Academy cadet turns goo into bullet-stopping armor

A US Air Force Academy cadet demonstrated that school lessons aren’t just about retreading old ground, by turning a classroom exercise into a new ballistic armor made out of goo. In 2014, Cadet 1st Class Hayley Weir’s assignment to combine epoxy, Kevlar and carbon fiber into an anti-ballistic substance inspired her to develop the task into a new type of flexible bullet stopper.

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Remember that discover that pushes backwards

this one

Scientists create negative-mass fluid that flows against the force
http://newatlas.com/negative-mass-fluid/49040/

It might have amour applications

I wonder if you could find a way to use the kinetic energy of bullets hitting armour.

If its possible to create a negative mass fluid

then it might be possible to create a negative mass solid

for ships, tanks, aircraft, body armor etc

Cymek said:

I wonder if you could find a way to use the kinetic energy of bullets hitting armour.

It’s not much energy, typically a fraction of a kJ.

dv said:

Cymek said:

I wonder if you could find a way to use the kinetic energy of bullets hitting armour.

It’s not much energy, typically a fraction of a kJ.

negative mass solids could use the kinetic energy

that’s if its possible to create negative mass solids

why aren’t you at krispy whatsit?

monkey skipper said:

why aren’t you at krispy whatsit?

A negative mass doughnut might be interesting to eat

then again a negative mass bomb might be interesting too

Tau.Neutrino said:

monkey skipper said:

why aren’t you at krispy whatsit?

A negative mass doughnut might be interesting to eat

then again a negative mass bomb might be interesting too

soz neutrino. my bad

There won’t be negative mass solids.

Or negative mass fluids.

So, what actually happened here? When you chill collections of certain atoms to ultra-cold temperatures, they take on wacky properties — the strange laws of quantum mechanics begin to apply to larger sets of particles than they usually do. That’s why we can have things like superfluids and supersolids whose atoms seem to pass through each other without resistance.

The researchers took around 10,000 rubidium atoms and trapped them using a pair of lasers, then endowed them with specific properties using another set of lasers. They turned off one of the trapping lasers, and some of the rubidium atoms spread and pushed themselves apart. But some of them didn’t spread, and even moved the opposite direction the physicists expected them to, according to the paper published last week in Physical Review Letters. Does that sound like negative mass to you?

It shouldn’t, because it isn’t. It’s negative effective mass.

https://www.gizmodo.com.au/2017/04/no-scientists-didnt-just-create-negative-mass-or-defy-the-laws-of-physics/#LYRffkXybo6fhI6k.99

>>There won’t be negative mass solids.

Naysayers and party poopers are not allowed on the research team.

I wonder if negative mass fluids could have applications in rocket fuel?

Tau.Neutrino said:

I wonder if negative mass fluids could have applications in rocket fuel?

As I mentioned mere seconds ago, there will never be any negative mass fluids.

So, what actually happened here? When you chill collections of certain atoms to ultra-cold temperatures, they take on wacky properties — the strange laws of quantum mechanics begin to apply to larger sets of particles than they usually do. That’s why we can have things like superfluids and supersolids whose atoms seem to pass through each other without resistance.

The researchers took around 10,000 rubidium atoms and trapped them using a pair of lasers, then endowed them with specific properties using another set of lasers. They turned off one of the trapping lasers, and some of the rubidium atoms spread and pushed themselves apart. But some of them didn’t spread, and even moved the opposite direction the physicists expected them to, according to the paper published last week in Physical Review Letters. Does that sound like negative mass to you?

It shouldn’t, because it isn’t. It’s negative effective mass.

https://www.gizmodo.com.au/2017/04/no-scientists-didnt-just-create-negative-mass-or-defy-the-laws-of-physics/#LYRffkXybo6fhI6k.99

Would negative mass instantly annihilate itself if it came into contact with matter

dv said:

Tau.Neutrino said:

I wonder if negative mass fluids could have applications in rocket fuel?

As I mentioned mere seconds ago, there will never be any negative mass fluids.

So, what actually happened here? When you chill collections of certain atoms to ultra-cold temperatures, they take on wacky properties — the strange laws of quantum mechanics begin to apply to larger sets of particles than they usually do. That’s why we can have things like superfluids and supersolids whose atoms seem to pass through each other without resistance.

The researchers took around 10,000 rubidium atoms and trapped them using a pair of lasers, then endowed them with specific properties using another set of lasers. They turned off one of the trapping lasers, and some of the rubidium atoms spread and pushed themselves apart. But some of them didn’t spread, and even moved the opposite direction the physicists expected them to, according to the paper published last week in Physical Review Letters. Does that sound like negative mass to you?

It shouldn’t, because it isn’t. It’s negative effective mass.

https://www.gizmodo.com.au/2017/04/no-scientists-didnt-just-create-negative-mass-or-defy-the-laws-of-physics/#LYRffkXybo6fhI6k.99

ok

“Weir started developing her idea for a Kevlar, composite shear thickening armor. When the two looked at the existing research, however, they found that no one had produced anything similar to Weir’s combination. In 2016, Weir and Burke conducted tests with the new armor as they tried to develop a mix of the three elements that was most effective.”

OK, a small but important technical advance.

> that’s if its possible to create negative mass solids

That’s impossible. (To appear in Good Scientist Cartoon number 143). It would allow perpetual motion.
Subatomic particles with imaginary mass are possible. eg. Faddeev–Popov ghosts.