Physics Random physics questions

[Snake_Baker]

Anyone want to have a crack at this?

 

[Werewolf]

Apparently there are a few places with anomalous gravitational effects, which no one can explain

 

[Snake_Baker]

Really? It is fascinating.

My guess is that it could be a visual anomaly created by the landscape.

 

[Bradesmaen]

My guess is it's not as down hill as he thinks.

 

[Kardinia Boy]

There's a road near Hanging Rock where the same thing happens.

 

[Werewolf]

There's a road near Hanging Rock where the same thing happens.

Do you know which one? That's not too far from my place in the country. It would be nice to check it out

 

[Kardinia Boy]

Do you know which one? That's not too far from my place in the country. It would be nice to check it out

https://www.onlymelbourne.com.au/anti-gravity-hill#.WnqI_WiCy70

 

[GreyCrow]

Which way do the trees and shrubs grow?

No prize for those who say up

 

[Frank Bunn]

Apparently there are a few places with anomalous gravitational effects, which no one can explain

It's just an illusion.

 

[The Passenger]

Gravity hill. Optical illusion.

 

[HairyO]

It's just an illusion.

Electric Brae. Weird place. Went there with a family member and he stops the car and asks me which way we will roll.

Freaked me out a little.

 

[Snake_Baker]

Are decayed neutrons the source of dark matter?

When physicists strip neutrons from atomic nuclei, put them in a bottle, then count how many remain there after some time, they infer that neutrons radioactively decay in 14 minutes and 39 seconds, on average. But when other physicists generate beams of neutrons and tally the emerging protons — the particles that free neutrons decay into — they peg the average neutron lifetime at around 14 minutes and 48 seconds.

The discrepancy between the “bottle” and “beam” measurements has persisted since both methods of gauging the neutron’s longevity began yielding results in the 1990s. At first, all the measurements were so imprecise that nobody worried. Gradually, though, both methods have improved, and still they disagree. Now, researchers at Los Alamos National Laboratory in New Mexico have made the most precise bottle measurement of the neutron lifetime yet, using a new type of bottle that eliminates possible sources of error in earlier designs. The result, which will soon appear in the journal Science, reinforces the discrepancy with beam experiments and increases the chance that it reflects new physics rather than mere experimental error.

But what new physics? In January, two theoretical physicists put forward a thrilling hypothesis about the cause of the discrepancy. Bartosz Fornal and Benjamin Grinstein of the University of California, San Diego, argued that neutrons might sometimes decay into dark matter — the invisible particles that seem to make up six-sevenths of the matter in the universe based on their gravitational influence, while evading decades of experimental searches. If neutrons sometimes transmogrify into dark matter particles instead of protons, then they would disappear from bottles at a faster rate than protons appear in beams, exactly as observed.

https://www.quantamagazine.org/neutron-lifetime-puzzle-deepens-but-no-dark-matter-seen-20180213/

 

[Pie eyed]

My guess is it's not as down hill as he thinks.

IT would take 15 minutes to check the actual grade with a dumpy level......
Just like the alleged "gravity anomaly" at Hanging Rock.
There are literally dozens of these sites around the globe where the road "appears to run minutely up hill" due to the surrounding vegetation etc but in all cases runs downhill when actually measured....which typically leads to the usual idiots claiming the non-existent "gravity anomaly" causes the instruments to fail.....ROFL