However, when I entered Feynman's Multiple Histories into a search engine the results don't seem to match what Hawking said in his book.

So who is right and what does Multiple Histories mean?]]>

https://www.theverge.com/2024/1/3/2...adar-fishing-vessels-offshore-energy-wind-oil

I feel like someone doesn't know how to do Venn Diagrams.

"Non-fishing vessels" must needs subsume "Oil vessels" and "Wind vessels".

I'm not sure how or why they make a distinction with oil and wind vessels, but OK, y'all do y'all.

Really, all they have to do is change "Non-fishing" to "Other" and the discrepancy would be resolved....

File under data visualization]]>

This is a question that appeared on the American SAT test until it was recently removed.

Every student ever has gotten it wrong, and that's because the SAT writers got it wrong too.

Can

Deceptive SAT question]]>

By rigid object, I mean that the object cannot change proper distance with any of its immediate material. This is somewhat more loose than Born rigidity. For a 3D object, the only difference is that I allow the object no not have a rest frame. An accelerating Born-rigid object is already necessarily...

Some Special Relativity exercises with rigid objects]]>

The Time Dilation Equation (TDE) of Special Relativity]]>

How Old Is My Home Twin Right Now?]]>

… instead of protons, it is now the turn of lead ion beams to collide, marking the first heavy-ion run in 5 years. Compared to previous runs, the lead nuclei will be colliding with an increased energy of 5.36 TeV per nucleon pair (compared to 5.02 TeV previously) and the collision rate has increased by a factor of 10. The primary physics goal of this run...

Crash Heavy: LHC Set for Lead Ion Collision]]>

Note:

To understand this post you need to have a knowledge of Newtonian physics, linear algebra and at least introductory level Special Relativity.

Subject:

I'm trying to understand the difference between two SR Transformations that apply when transforming between Inertial and Accelerating reference frames....

Differences in SR Accelerations Transformations]]>

Example:

[tex]\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

Displays as:

\(\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

I wonder if someone who is good at LaTex could write a short tutorial of the basics, with some common SciForums examples? I'll write one up myself, but I'm a complete beginner at LaTex so it will take a little while.

In the meantime, here's an external tutorial site:...

Displaying equations using Tex]]>

email: PhysicsFiddler@gmail.com ___________________________________________________________________________

Abstract:

There is not unanimous agreement about the outcome of Bell’s Spaceship Paradox. Some say the thread breaks, and some say it doesn’t. Who is correct? Does the string break or not? The answer depends on how the acceleration is determined. If the acceleration is determined by calculations...

Bell’s Spaceship Paradox. Does the string break?]]>

`

F_unified = G + E + S + W + Q

Gμν = 8πGTμν + Λgμν + Qμν

Developing a complete equation that solves the quantum gravity problem within the framework of your scenario and general relativity is a monumental task, and it's not possible to provide a single equation that accomplishes this in a brief response. Quantum gravity remains one of the most challenging problems in...

Unified field theory]]>

Questions about light..]]>

View attachment 5569

I thought it was interestingly geometric so I thought I'd deconstruct it. This is what I got:

View attachment 5571

So now I'm trying to figure out what ratio that second smaller square is to the full-sized square. It's self-referential:

View attachment 5572

I took me a while...

Math in Marketing]]>

I thought this was pretty cool, note that he is using solutions to Euler from 1757!

I assume it is this https://en.wikipedia.org/wiki/Inviscid_flow

Note Navier Stokes is in there too, that was used during covid for a couple of studies about ventilation in a room regarding the dispersal of the virus.

I am not a mathematician but finding out about these modern application in science and...

A Proof that certain spherical vortices exist in a stable state “potential for advancements in today]]>

The data comes from experiments at the Fermilab US particle accelerator...

Force Five Adventure: Legend of the Wobble]]>

https://phys.org/news/2023-08-neutrinos-cern-large-hadron-collider.html

Neutrinos are difficult to detect because they have only a very small mass and no charge.

How do you build a detector to find that type of particle?

CERN manged to do it via their SND and the details are in the link.

Note the quote in the article. "....every time neutrinos have been discovered from a new source, whether it is a nuclear reactor, the sun, the...

The first observation of neutrinos at the LHC]]>

https://www.thoughtco.com/quantum-zeno-effect-2699304

"What’s unique about the Copenhagen interpretation is that it makes the outside observer responsible for the wave function’s ultimate fate. Almost magically, a quantum system, with all its possible states and...

The Quantum Zeno Effect]]>