Physics (from Ancient Greek: φυσική (ἐπιστήμη), romanized: physikḗ (epistḗmē), lit. 'knowledge of nature', from φύσις phýsis 'nature') is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves.Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over much of the past two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the Scientific Revolution in the 17th century these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy.
Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism, solid-state physics, and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.
Hello all! I have been taking an academic break from school for certain mental health reasons that I won't waste your time talking about. Now, I am only a freshman in college. My school's physics department currently offers 2 majors: Physics and Physics/Astronomy. Obviously, I have lots of time...
I am about to start a physics with theoretical physics major, I've taken calculus before but I've not been satisfied with the "memorization of formulas" type books.
I started to read Spivak and found it enjoyable, but since it's a major undertaking I am also concerned for the practical value...
Reif, statistical physics
"The equilibrium macrostate of a system can be completely specified by very few macroscopic parameters. For example, consider again the isolated gas of ##N## identical molecules in a box. Suppose that the volume of the box is ##V##, while the constant total energy of...
An IQ of 120 is plenty good, but the average IQ of Physics and Astronomy majors is higher. It's even higher for brilliant theoretical physicists and Physics PhD holders. So is it possible, with enough hard work and dedication, that someone with a 120 IQ could become a theoretical physicist? Or...
Question is in file please these questions and send it to me
Q1: A 2 kg piece of cheese is placed on a vertical spring of negligible mass and force constant k= 2000 N/m that is compressed 16 cm. when the spring is released,
(I) How high does the cheese rise from this initial position?
(II)...
I tried to find states in direct method using ##\frac{E}{E_0}=\:nx^2+ny^2+nz^2## and ##100\:<nx^2+ny^2+nz^2\:<\:136##
But it was too long, found it using phi approximation there are around 300 energy states, and Python find around 271 states using direct method but I need manual or recursive...
I am on my first year of my master's degree in nuclear and particle physics, and right now i am ending my first semester, where i decided to take a course in physics of semiconductors. As i end this semester i start to wonder if there was any use in learning about this subject, as it seems like...
I stumbled across this series of 28 lectures by Dr Frederic Schuller of the university of Twente whilst searching for lectures about Lie theory. Having watched through lectures 13 to 18, I think they are simply superb (of course I'm assuming the rest are of similar quality). I only wish he would...
Summary:: Lottery physics- balls placement and positions
Hi all,
I am not a Ph.D. in physics or even close to that, I only had some physics classes when I was at high school .
the thing is that I like to examine things. I came across the lottery one time in my life and heard many assumptions...
I am 18 and currently in the middle of taking a gap year from high school to college. I am going to college this fall, and I want to go into college with a better grip on what I want to do than I have now. I absolutely love physics, science, and math. I also have a huge attachment to the idea of...
Summary:: I am learning particle-in-cell (PIC) python 3X code. PIC currently represents one of the most important plasma simulation tools. It is particularly suited to the study of kinetic or non-Maxwellian effects.
I am learning particle-in-cell (PIC) python code. PIC currently represents one...
Springer has a 50% currently till the end of December. I know plenty of good math textbooks from Springer, but what are some good physics books? Particularly at the undergraduate level.
An interesting article about theoretical physicist Chris Isham (by Michael Duff) has been posted on the arXiv,
https://arxiv.org/abs/2112.13722
Combine this with (from "Group Theory for the Standard Model of Particle Physics and Beyond" by Ken Barnes)
Isham has written two books that I quite...
Hello, I am ready to apply to grad schools and would like to have a few insurance schools just in case. What are the easiest physics fields (biophysics,nuclear physics...etc) to get into a PhD for?
Regards,
This is the beginning of an online reading course of the book "Statistical physics" by Reif, volume 5 in the Berkeley physics course, using PF.
We'll start with chapter 3 and loop back to the initial 2 chapters if necessary.
All questions should be specifically about what is written in the this...
I was in graduate school for an Applied Physics PhD program for 3 years, where I got my Master's and took all the required classes for the PhD. I left because I wanted to try my hand at teaching, and I LOVED it. Now I am 34 years old, and I am wondering if there is any possibility of going back...
Rewarding career after physics graduation - Mysterious money ?
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Thanks for your response to my threads. This is an interesting forum to seek an insight on this subject.
I am surprised by recent piece .
Physics professor mysteriously sent...
Hello, I'm about to graduate with undergraduate degrees in physics and computer science. I'm considering applying to graduate school because I want to do physics research, but I also need a decent job at the moment (I don't believe that graduate students get paid more than a survival wage). Is...
Hello, I'm a first year university physics student, and I'm having a hard time understanding the material, which badly affects my grades.
I'm posting this thread hoping to get some tips for how and where to learn physics(reading materials, online lectures) aside from my university lecture, which...
Summary:: I’m a beginner trying to get into Quantum Physics, and want some good resources (e.g. books) to get me started.
Hi everyone!
I’m a beginner trying to get into Quantum Physics, and want some good resources (e.g. books) to get me started.
I have a very basic knowledge of physics (10th...
Hi! I’m @schrodingers_cat, and I am new to this forum.
While I currently have a limited knowledge of physics, I am excited to learn more about the field.
I am interested in the idea of researching quantum physics, however I do not know where to get started.
I hope this forum helps me in my...
The mathematician and mathematical physicist Alain Connes has expressed in many occasions that he is a Platonism and he thinks that mathematics itself does exist in the same level (or even in a "stronger" level) as physical reality.
This is very similar to Max Tegmark's hypothesis of the...
This is rather a philosophical question, so I will limit it to a topic in physics. I'm interested in knowing your opinion, and perhaps your thoughts on how physics is being developed and progressed today.
Namashkar everyone.
This is Annwoy Roy Choudhury from Kolkata, West Bengal, India. I am a first-year student at the Indian Institute of Petroleum and Energy, Visakhapatnam Chemical Engineering under the Indian Institute of Technology, Kharagpur. As everything got delayed here because of the...
Hello everyone.
I am from Kolkata, India. This year I have cleared IIT-JEE and taken admission to the Indian Institute of Petroleum and Energy, Visakhapatnam Chemical Engineering which is under the mentorship of the Indian Institute of Technology, Kharagpur. Even though I had to pursue...
Nearly two decades after I graduated with an engineering degree, I'm currently studying for a master's with a particular emphasis on conceptual/theoretical statistical physics. Based on my interests and stylistic preferences, I'm using the following books to build my understanding of physical...
Homework Statement:: This is from 5 ed, Physics 1Halliday, Resnick, and Krane. page 428 about sound waves
I have highlighted the equation that I don't understand. How did the author get it? I understand how they get from the middle side to the RHS of the equation, but I don't understand how...
Hello! I would love to know if any of you have some nice physics poetry. I often think in terms of graphs, and a lot of my metaphors relate to superposition and the uncertainty principle, but I always have a difficult time expressing that in poems. I was wondering if anyone had discovered how to...
What are the majority of days like? Is it always the same everyday or is everyday something brand new?
Is there any aspect of this career that you didn’t expect to like that you did? Is there any aspect you didn’t expect to dislike that you did?
If you could change one aspect about your job...
Why the wheel moves? I intuitively think that it should move to right but I don't really understand why. When AB gets longer by x each end gets longer by x/2 so W goes to right and down. This will create torque and body will move. This explanation seems valid but I can't calculate anything and...
(EDIT: I have also added 2 snippets of the syllabus of the entire Math Physics course in my curriculum as reference).
I am currently in the 3rd Semester of my 3 year UG Physics degree from where the subject of Math Physics has been separately included.
I need extensive guidance from someone...
a) V=(4/3)pi(r^3)
N=M/m_n (M=mass of neutron star, m_n=mass of neutron)
Subbed into E_f = (hbar^2 / 2m) (3(pi^2)N / V)^(2/3).
T_F = E_F / k_B
b) dU = (dU/dS)_s dS + (dU/dV)_s dV
p = -(dU/dV)_s dV
V=(4/3)pi(r^3) -> r = cubedroot(3V/4pi)
subbed into U_g = -(3/5)(G M^2 / r)
take (dU/dV)
plug into...
Hello, dear all. Currently I'm studying MSc in physics hoping to do PhD soon after my graduation. I did my bachelor in Quantum Electrodynamics, and before starting my MSc in physics, I was working as a research assistant in experimental HEP lab, and I thought I wanted to explore other subfields...
for the first question, i thougth that 0,5 A is the answer?
for the second question:
i used the E =hc/λ to found the E. but i got a little confused which equations to find ∆E, since there's no ∆t. or should i search the momentum, then use the λ= h/p ?
Hi there,
I know this question has been asked a million times but I need some help.
Essentially, I am studying for F=MA/UsaPhO with the goal to make camp or IPhO(?) this year.
I have begun studying with University Physics with Modern Physics, and yesterday read the first chapter of the E&M...
¿Cómo es la calidad de la acción y la variación de la energía y el movimiento, durante el desplazamiento, cuando se usa un columpio y un tobogán de agua?
[Translated by a Mentor using Google Translate]
Apparently there are problems with him snapping his fingers while wearing a glove
https://www.sciencenews.org/article/finger-snap-physics-new-high-speed-video-thanos
Summary:: Changing the speed of light, etc.
First: thank you everyone. You have all been a great help. I am a retired engineer trying to fill the gaps in an inferior education. Thank your for your ongoing guidance with all the questions I have asked over the years.
Now I will ask an absurd...
What are some of the hardest concepts to learn in AP E&M? I am going to prepare for the exam with my previous physics teacher. I am currently a senior enrolled in AP Calc BC, and I already took AP Mechanics.
I have a 3.29 in the major, research experience in my last year and should be published in the spring. Good recommendations… I’m so stressed…. Kicking myself is an understatement. I just want to get into a respected school, doesn’t have to be a top tier school obviously… just something respected...
Summary:: 3.0 gpa(which may be considerably bad :((((), 3 research experience(1 summer term,1 fall,1 spring term) and 1 project in undergraduate
Hello everyone these are those what I had in undergraduate physics.I am going to apply to top tier schools in France,Taiwan and China.Do you think...
I am studying mathematics bachelor and next semester I have to choose some modules. I am really interested in physics, especially particle physics and quantum mechanics. So I am taking partial differential equations and Stochastic processes or Geometry and topology.
There are also numercal...