Important Definition and 498 Threads

In my news feed this morning, I got the following story: https://www.sciencealert.com/scientists-tested-einsteins-relativity-on-a-cosmic-scale-and-found-something-odd Sounded important, so I thought I would get the actual paper: https://arxiv.org/abs/2107.12992 Am I missing something? It is...

Hello. I wonder about the most important secrets of physics today. Once it was the "secrets of atom". Countries were in a race to be the first to do "atomic bomb." For that reason, America started the Manhattan Project. Similary, do you know names of the most important developments of physics...

From what I've gather the primary benefits to worm wheels are: - their ability to provide high reduction ratios - self-locking which can be useful for hoisting and lifting applications. - Operates silently and smoothly, which reduces vibrations Feel free to add any important ones I might've...

What do you think?

hi all! I'm a first-year second-semester physics major, problem is I'm very weak at math, often not getting questions right just because I get stuck with the mathematics part. this affects me in both mechanics and electricity what are the most important math subject and tools needed for physics...

Summary:: I am looking to take a engineering classes relevant to mechanical and or aerospace engineering. I am challenging my assumption that Statics & Dynamics is the most important and foundational/fundamental course to either mechanical or aerospace engineering (maybe fluid dynamics for...

Summary:: Requesting Your Ranking: https://www.npr.org/sections/13.7/2013/09/10/221019045/the-10-most-important-questions-in-science In the above https are the ten most important questions in science suggested by NPR--I totally agree. So, my request is, especially from our more qualified...

Why house is important?

Summary:: What is the important thing to consider a factor for build a house ? I am a civil engineering student and I have a question about What is the important thing to consider a factor for build a house ?

[Mentor Note -- Multiple threads merged. @issue -- please do not cross-post your threads] Hi, everyone It is known that binomial distribution can also be solved by polynomials. i add document with a question I can not solve. Glad to get for help Thanks to all the respondents

Who, in your opinion was or is the most influential physicist. Was it Feynman and his diagrams and lectures. Was it Dirac with his work on positrons. Was it Einstein and his general relativity. Who do you think and why.

I want to ask that if i use light head magnifying glass is it safe? For embroidery or an idea came to my mind that why not I use Webcam and a big display like 23 inch and then focus webcam on my embroidery and see on my LCD I have also reflector glasses to avoid eye strain totally ? . Because in...

I guess the crux of the question is, where are we more likely to encounter new physics? The standard model already explains almost every experimental result, but not EVERY result. But what are some of the most important results that are either incompatible with the standard model or just...

Through my 2 analog classes and 2 electronics classes I have learned about resistors, inductors, capacitors, BJTs, Mosfets, and FETS. What are some other fundamental components that I should be taking a look at? To add to this, I don't consider gates as fundamental because they are built up from...

I guess my question boils down to "Is choice of signature important when dealing with superluminal 4-velocities"? I wanted to show for superluminal velocities that ##\tilde{U} = \left( \frac{c}{\sqrt{\frac{u^2}{c^2} - 1}}, \frac{\dot{x}}{\sqrt{\frac{u^2}{c^2} - 1}}...

Hypothetically, say Student A is required only to take subjects falling under his or her major in order to graduate. And suppose that Student A chooses to focus on only those subjects relating to that major. Let's say now, that there is a Student B, who shares the same major as Mr. A. Student B...

I know that our laws are as far as the logic goes Universal? Now, can we use other ancient number systems and come up with the same results, or is the success of all the recent science dependent on the efficiency of Hindu Numerals ? Is the logic of all mathematics based on Hindu numerals , and...

As the tittle say. I've been out of touch with many branch of non-quantum non-relativistic physics and I would like to know what people that work in these areas would say are the most important or interesting current trents of research in classical physics.

Summary:: What are the most important physics publications in history according to you? thanks in advance :)

Hey, I'm a senior in a high school in Canada and I'm thinking of pursuing mathematics and philosophy in university. I'm quite interested in mathematics and philosophy but I am also interested in lots of other topics. The main reasons that I want to study math and philosophy at university is...

i've been offered a place where the supervisor's phd students tend to publish at least four times before graduating with their PhD, however it's not a university I would have selected for my undergrad studies, to put it that way. But I've noticed a lot of such places, including this one, seem to...

Hi! I was watching some random videos about electricity on you youtube and then got this question: if AC changes direction constantly (50 times per second) then why is it still important to connect live to live and neutral to neutral in wall outlets? For example some wall outlets have different...

I have been reading Sean Carroll's recent book called Something Deeply Hidden where he advocates a Many Worlds Interpretation of Quantum Mechanics. I was thinking that the most important question in all of Physics might be is everything quantum or is there a quantum/classical boundary. If we...

The universe after the big event was a lot of lifeless stuff. However, as things settled down the rules behind the curtain were such that life was allowed to develop, they may have even been such that they encouraged the things to happen that were conducive to the process that has resulted in...

Hey guys, what would you say are the most important aspects of the job of being a nuclear reactor operator?

How much essential is it to learn concepts such as - different types of transport of vectors, like Fermi Walker and Parallel transport; - different frames (basis vectors); - tensor densities and integrations To put it another way, do they play a important role in the theory? If one for some...

How valid is the statement "It means physics is ultimately concerned with descriptions of the real world" in the realm of QM? Heretic question, what is "real" besides the outcome of the measurement?

Summary: How is the universe best viewed considering the great difference between smallest and largets things? I am not sure how to phrase this question so forgive me if it is all wrong. I have noticed that science is doing a lot with small, very small things. They also do a lot with big...

Hello, Recently I viewed a blog post about SAT Math preparation. It stated that quadratics is the chapter which is most asked in SAT, and if I don't master the chapter, I can't answer most SAT problems. IMO, this statement above implied that quadratics (quadratic equation) is the core chapter...

Let’s say to the average Astronomer conducting research; generalizing the research to “astronomy” ; which would be more useful for the “average” Astronomer on a day to day basis: Quantum Mechanics or General Relativity? Obviously most are, but which so more? Which would be referred to more?

My plan is to use the compressor at work as a free ride to and from work. I want to install an air tank (a rated one, not an improvised one) onto a bicycle and then run an air motor to turn the wheel (with whatever gears etc needed to make it work). I will probably be using an air tool, such as...

I seem to be constantly bombarded with updates on my desktop, tablet, and cellphone, for the operating system, apps, you name it. Should I be allowing them, or blocking as many as I can (like I have been doing)? Do they provide some benefit, or do they cause unanticipated problems for devices...

Hi, I'm just starting to read Wald and I find the notion of the commutator hard to grasp. Is it a computation device or does it have an intuitive geometric meaning? Can anyone give me an example of two non-commutative vector fields? Thanks!

Why protective measurement is important to understand whether the wave function is the ontic property of a single particle and not of the ensabmle of similarly prepared particles? I need some help with understanding the following topic (which is currently above my level so I may easily miss...

I want to get a poll going... When U.S graduate schools consider applicants for physics, what are the most important factors they consider in admissions? —RANK THEM— *Consider both theoretical and applied applicants.

I am working on a presentation for a course in general relativity and my topic is the stability of black holes. In many of the references and articles that I have found, the author asserts the importance of the conjecture but offers no reason. So I ask: Why is the black hole stability conjecture...

Hey! I will start my third year on the theoretical physics program. I have taken an introduction course in particle physics, just the basics, not much math. (quark and Feynman diagrams the forces and interaction , CRM matrix and cabibbo angle etc. ) Now I'm choosing between relativistic...

I'm looking at a few schools to transfer to and one that interest me is Benedict college. I was doing some research online about the school and come to find out I haven't seen anything about the engineering programs being abet accredited. Is abet accreditation really important when it comes to...

Close your eyes and listen to this clip. It may sound like a Tibetan meditation bowl or a giant cosmic didgeridoo, but it's actually the sun! Kind of. A group of very poetic scientists from NASA and the ESA (The European Space Agency) used data from NASA's Solar and Heliospehric Observatory to...

Can a percentage of total and immediate (hypothetical sub 1 second) T-Cell loss cause death to a typical adult? What percentage of hypothetical immediate loss would yield rapid death under 1 minute? What would the most likely cause of death be? What size is a typical T-Cell in µM^3 ? Is...

Homework Statement Give two reasons why transformers are an important part of the power distribution grid My lessons don't have any information regarding this topic. I have read everything in my lesson and can't find anything to answer this question. please help. thank you

I understand that it is useful to learn and remember the derivations of formulae in most cases. However, I tend to forget the derivations of several formulae, especially those in optics and dynamics. For a moment, let's forget the examinations. I wish to pursue higher studies in applied...

hi I am studying algebra and i have a question. why is important that something is a vector space?, i mean, what implications have? matrix, complex numbers , functions , n-tuples. What do these have in common, apart from being a vector space? why is so important that a certain set of...

Hi guys. Due to the reason that I do not have a great knowledge related to finance, I wanted to ask if someone can simply explain me how important is for the society, the work of the people that work in the finance. How their job is useful for the people? Thanks Grands.

I want to make this a general question: what is/are the most important factor(s) that determines if an applicant to a job will be at least a candidate (selected for an interview). Is it previous professional experience? Is it credentials? Is it professional/personal projects? Is it networking...

To learn the real physics, you need to know what is myth and propaganda. For example, How high can you jump on the moon? Understanding Physics, we can estimate the height and the friction to the boot against the ground. Having the correct Physics, you can tell which one Hollywood like the movie...

I was looking at assist.org. A website for community college students that lists the courses you need to take at a CC in order to transfer to a UC or CSU. I'm a CompSci major, and realized that everyone of the articulation agreements required 3-4 quarters of Physics. I'm just wondering, why is...

I've seen that a lots of people end his carrier as a student without doing the master degree, and my question is, how much this one in important in the USA? For example in Italy is very hard to find a job with only a bachelor's degree, and probably it will be underpaid, cause the bachelor's...

Hi! My question is for people familiar with the two-Higgs-doublet model (2HDM). What phenomenological or theoretical problems of this model are important to work on? I am a postgraduate student. I have studied the Higgs sector of the Standard Model (SM) and the Higgs sectors of some of its...