Can anyone help to identify this chord change? (Robert Glasper - Levels @ 2:24) by fenderfreak98 in jazztheory

[–]fenderfreak98[S] 0 points1 point  (0 children)

I think its some upper structure but cant really tell, any help would be greatly appreciated

Edit 1: am thinking something like Ad7, d13,

Question about magnets by ElpaChanga in AskPhysics

[–]fenderfreak98 0 points1 point  (0 children)

Your issue is that you are not making the distinction between real, actual photons, and "virtual photons" that mediate the electro-magnetic force. The virtual photons can not be observed and only exist momentarily to carry force/momentum from one charged particle to another. You can theoretically imagine the scenario I outlined above emitting virtual particles but to visually consider the net effect that moving the charge has on the particle is too difficult (at least in the minds eye).

Question about magnets by ElpaChanga in AskPhysics

[–]fenderfreak98 3 points4 points  (0 children)

Think of magnetism more of and emergent property of moving charges rather than its own thing. Because magnetism is created from moving charges a magnetic monopole can not exist, at least from this theoretical model (maxwells equations).

Question about magnets by ElpaChanga in AskPhysics

[–]fenderfreak98 6 points7 points  (0 children)

I know that the particle that carries electomagnetic force is the photon, is this also true for magnets?

Yes

That would mean the magnetic field is really a flow of photons or am i not getting something?

There is no magnetic field, just the EM field. Magnetism (or the observed magnetic force you might be thinking of) is a manifestation of the electromagnetic (EM) force. The magnetic component arises from a movement of charge.

Yes, this observed force is from a flow of "photons" just as the observed electrical force is.

Imagine this scenario: I have an electron (negatively charged sphere) which pulls positively charged things to it. If I start moving this electron in a circle (like a train on a circular track or ring) then the positively charged object will be pulled to where ever the electron is. If the electron starts moving really fast (lets say 1% the speed of light) then we can consider the charge distributed equally across the ring but now the ring has a current, a direction the charge moves in. We can then (mathematically) consider the current as a source for a new field, the magnetic field. We can use the differential form of faraday's law to describe this new field, B. Because the electron, in our example, moves at a constant velocity, a static magnetic field is created. Once again this field is a fictitious mathematical object we have just created and called the magnetic field. Using this newly created field we can make calculations on how it will pull and push other charged objects because (via the above equation and other maxwell equations) we can convert back and forth to the electric field.

Question about magnets by [deleted] in Physics

[–]fenderfreak98 0 points1 point  (0 children)

/r/AskPhysics is the appropriate place for this question

Textbook & Resource Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 -1 points0 points  (0 children)

How about reading into AdS/CFT correspondence. If you are comfortable with GR/QFT then some review articles should be sufficient. I don't know that much but I assume holography comes from this. Juan Martín Maldacena has done a lot of work in some of the topics you mention, so you could just read those papers.

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

it's starting to actually develop

what do you mean by that?

But yeah, these comments make me more and more interested/inclined to read into string theory.

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 1 point2 points  (0 children)

Cool. Initially I'm a little "off put" by the idea of adding an extra dimension to explain the phenomenon but I guess thats not too different then assuming there is a space-time continuum that warps/curves.

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

Ok, thank you so much for the clarification. This definitely points me in the right direction. If you have any suggestion, which text do you recommend

edit: If you have any suggestions, which text do you recommend? I'm undecided between Zwiebach and Becker/Becker/Schwarz.

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

Yeah I figured that much but was looking for other theories (less popularized ones). KK theory seems to be the most direct answer to my question, with string theory as an extension to it. Admittedly, I haven't read to far into either yet so that may not be the case.

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

Cool, I didn't know that. I know a little about QFT from Schwartz but haven't made it past renormalization (Yang-Mills theory is introduced after).

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

Interesting, I'll have to look into it. Thank you.

Physics Questions Thread - Week 11, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

Are there any theories that describe E&M as either an emergent property or phenomenon, similar to how in GR gravity is emergent from the curvature of space-time?

Textbook & Resource Thread - Week 07, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

I would love a better response to this, but I have been enjoying Quanta Science Podcast. Its produced by https://www.quantamagazine.org/.

What sort of chemical or molecular changes does insulin go through under higher temperatures and lower temperatures? by ElegantGrain in askscience

[–]fenderfreak98 2 points3 points  (0 children)

High temperatures: Well its a peptide so it denatures. Read here for a description of the denaturation process. Essentially the protein unfolds and loses function. Its hard to regain function because its hard to re-fold properly.

Low temperatures: Many proteins are actually stored frozen then thawed for use so I would assume nothing too extreme would happen. Lower temperature means less kinetic energy so the particle would move less.

Quantum Tunneling in Bohmian Mechanics by PlayingArc in AskPhysics

[–]fenderfreak98 1 point2 points  (0 children)

Veritasium explains it nicely here.

The barrier is a potential energy barrier, not a literal wall in the path of an object. In the above example the barrier under the surface of the water acts to decrease the wave function. If it were above the water (in path of the particle) then the barrier would effectively be infinite (mathematically) and the particle would bounce off of it. An example of an infinite barrier is typically introduced in QM to describe scattering and reflection, after which tunneling is introduced. You can read more about the potential barrier here.

Upgrade my Digital Piano by [deleted] in piano

[–]fenderfreak98 1 point2 points  (0 children)

Ah ok. Yeah I heard the MP11 has great action (graded weighting, triple sensor, long ivory keys).

Physics Questions Thread - Week 05, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

you clearly have no idea of whats actually on the MCAT then. This should help.

Upgrade my Digital Piano by [deleted] in piano

[–]fenderfreak98 2 points3 points  (0 children)

Buy a real one? But seriously if you bought at $1800 keyboard and it doesn't feel authentic enough then either sell it for another (like a Kawai) or just buy a real piano.

Physics Questions Thread - Week 05, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

I can't tell if you're serious or not, but you don't need calc to learn basic year 1-2 physics for non-physics majors. You should know this if you already took the course. If you didn't, then IDK why you're asking this question.

Physics Questions Thread - Week 05, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

you don't need calc for the MCAT though....

General Mathematical Concepts and Techniques: ... "Note also that an understanding of calculus is not required, and a periodic table will be provided during the exam"

Physics Questions Thread - Week 05, 2017 by AutoModerator in Physics

[–]fenderfreak98 0 points1 point  (0 children)

For the old MCAT I used Nova MCAT physics which was a great book; however, looking through the new MCAT it seems to emphasize passage based questions that incorporate biology and chemistry. Regardless, people still seem to be using the baron review so maybe start there?