Physics Definition and 985 Threads

I have bachelors degree in electric engineering and masters in engineering management and 14 years of experience in software product development. So no experience in physics at all. Is it possible to do a phd in physics ? Its always been my passion that i now think about pursuing

The following is more of an interesting example and observation than a question that I am presenting for public comment. It's somewhat related to a recently thread, which was closed for moderation, but I think it's different enough not to fall under the ban of reposting threads that have been...

I was given two HW questions, I was supposed to solve on using ##<\vec{a}> = \frac{\vec{V}_f - \vec{V}_i}{\delta t}## and another using ##<f(x)> = \frac{\int_{x_1}^{x_2}f(x)dx}{x_2 - x_1}##, I was able to solve using the first formula but I wasn't able to do it with second (at least I got the...

Non-perturbative methods are critical in parts of quantum field theory, such as QCD, and have at least some applications in quantum electrodynamics. You can also have mathematical problems that don't have perturbative solutions. But, it isn't clear to me if classical physics can ever have...

Homework Statement: A door opened at 75 degrees from the latch remains at rest. When moved to a position 60 degrees from the latch, it slowly closes on its own. Is there another possible cause besides a sloping floor? Relevant Equations: \tau = r x F; v = \omega x r; a_T = \alpha x r, where...

I'm asking about this with particular reference to the signs of the answers. Here is the question: The answers in the back of the book are: (a) ##1.2 \times 10^4 \text{ N}## (b) ##39 \text{ m}## (c) ##4.7 \times 10^5 \text{ J}## (d) ##4.7 \times 10^5 \text{ J}## Here's a rough sketch of...

I am planning to take undergrad physics but I am concerned about the pay scale of physicists. Since I am the leader of my family (after my father), I will be financially supporting my family soon as my father retires (we have a family system). I also will have my wife and children. The reason I...

Hi, unfortunately, I have problems with the following task I tried the fast way, unfortunately I have problems with it I have already proved the following properties, ##\bigl< f,xg \bigr>=\bigl< xf,g \bigr>## and ##\bigl< f, \frac{d}{dx}g \bigr>=-\overline{f(0)} g(0)+\bigl< f,g...

TL;DR Summary: I am doing an experiment for my Physics IA and don't know the theory behind it I am working on a Physics experiment for my school where I vary the distance between a simple pendulum and an aluminium block, and get the damping coefficient for each distance. Below are the images...

My understanding of certain topics in physics has been flawed so now trying to learn it all over again. The internet is a fantastic place to relearn misunderstood concepts.

Hello everyone, I graduated a few years ago with a bachelors in aerospace engineering with a 3.2 GPA and a second author on a published research paper. I am currently working as a senior software engineer, but have been considering going back to school for a PhD in Physics. I am planning on...

I was able to solve part 1 but I am not not getting how to find new amplitude of the motion . Please help me

I'm not sure. A source said New Velocity = Current Velocity - TerminalVelocity every second until New Velocity = TerminalVelocity But it doesn't seem right

Homework Statement: . Relevant Equations: . How do I write equations and symbols in the homework statement and relevant equations sections?

A layperson who often bumps into tricky physics questions which require somebody who knows more than me.

to discuss the basic physics and review the law of physics from different angle.

Hello, everyone, I have a BSc in physics with a GPA of 3.6 in a 4.0 system. After my BSc, I was working in my country for about 2 years at a research institute, and at that time I didn't truly understand what is research and what I should specialize furthermore in physics, etc. Now, I'm...

For me, Event Horizon was very scary but had enough sci-fi and sci-real to it that it captivated me.

TL;DR Summary: help with math for physics undergraduate degree - advice needed Hello! I'm studying physics for my undergraduate degree. I have a question, and if anyone can help I'd truly appreciate it. I have problems with the math part. I love physics (concepts, research, findings) but i do...

I remember taking Physics in high school, so I guess it is possible, but it's been so long ago, I can't remember. It just seems that Calculus is indispensable when teaching Physics topics, except for a few like heat expansion or geometric optics. I would imagine that there is a lot of Δ this &...

I think that's it. I'm glad I can be part of this forum.

Curious. That's all.

Hello everyone, I am a Physics Masters student in USA (international student). I have completed a semester so far. Currently, I am working on a project under cosmology, which is related to Fischer analysis. Background: I have graduated with a BSc Mathematics with a physics minor. While...

Hi everyone, I am a Physics Masters student in USA. Just joined the forum to learn more about physics and whats new in the community and also looking for some career advice as needed.

I'm confused because torque increases with increasing moment of inertia (MOI) but angular velocity decreases with increased MOI because of conservation of angular momentum so angular acceleration would also decrease. And then power is the product of torque and angular velocity so with a smaller...

Hi everyone, looking forward to meeting people how like to think about physics and discuss, solve problems!

I am studying Physics to get into a University to study masters in India. But, I do realize how vital a role mathematics plays and I am studying Mathematical Methods for Physical Sciences by Mary L Boas for that. I have some background in Physics, I did study Physics in high school and...

TL;DR Summary: I have heard detailed description of what to do when you study physics, but I don't know how to learn Physics in the first place, so this post tries to counter that. Here's How to Teach Yourself Physics and Math [Futurism] How To Self-Learn Physics: The Ultimate Guide How to...

I will start an M.S. in Physics this fall at SJSU. If I apply to a PhD program in Physics once I am done with the M.S., will they consider the fact that I already have a PhD in Nanoscience and Nanotechnology, my age (38 years old now) and my immigration status (international student) for...

I haven't taken a math course since 2007 and never went past algebra 2 trigonometry

Hello. Thanks for having me. I'm Paul, from the UK. I'm interested in physics, and maths, and science generally, but mainly physics, and within that mainly cosmology. I'm maybe around GCSE level regards maths and physics, roughly high school diploma level in the US, according to Google, although...

I never stop learning physics, especially astrohysics and cosmology.

Hi, unfortunately, I am not sure if I have calculated the task a correctly. I calculated the eigenvalues with the usual formula ##\vec{0}=(H-\lambda I) \psi## and got the following results $$\lambda_1=E_1=-\sqrt{B^2+\nabla^2}$$ $$\lambda_2=E_2=\sqrt{B^2+\nabla^2}$$ I'm just not sure about...

Hi guys, I am a first year IB student who has to pick his EE topic. The Extended Essay is an independent, in-depth study of a chosen topic within one of the IB subject areas. I chose to do mine on physics. I have to write 3500 - 4000 words for my EE. I've chosen a set up for an investigation /...

I am an Indian and even though my English knowledge is somewhat better than that of an average Indian, there isn't a day I try to real highly technical books and fail to understand it at the first glance (or don't understand it at all). I understand why they use language which might seem...

For this, Can a the equation ##x = vt + x_0## not be considered a direct proportionality between ##x## and ##v##? If so, is it because there is a constant ##x_0##? Many thanks!

seeking help for clear concept

I was studying for a Physics Masters Entrance Exams (India) and my coaching institute basically suggested me these books: I actually have regretted buying books without prior research in the past, so I am making sure I do my fair share of research before buying any of these or something...

I was trying to learn physics from a coaching institute and they started optics before they started Electricity and Magnetism and the lecturer went on saying somethings which I didn't completely understand. Is the coaching institute doing it wrong teaching me Optics before they taught me...

In 12th and considering a career in research. Ik most of the collages ( IIT Kanpur, IISc Bangalore, IISERs etc ) but I am not sure of the research possibilities provided so if anyone can help out please do

1)The atmosphere is an extremely complex system, so much so that weather forecasts beyond a few days are not possible. Why are seasonal or 10-20 year climatological forecasts reliable? I heard from a climatologist in a video on YB (I know it is not a valid source) that weather forecasts are an...

Greetings, I am here to "brush up" on my general physics knowledge and more as a life long learner. My background is in biochemistry, but I believe in being well rounded as a scientist, a student and a educator.

Vixra.org? Forgive my ignorance but never heard of that. Until someone mentioned the name in a thread here. I quickly checked a number of abstracts; no author’s title, no affiliated institution. Recipe for avoiding it.

I've inserted a photo of the figure, hope everyone can see it. SOLUTION: 1. I first solved for the angle of 100 N and 50 N since I need the force that is perpendicular to point A. >> Angle of 100 N theta = arctan(3/4) theta = 36.870 degree >> Angle of 50 N...

I have learned a lot from you and I am now proud to be a member of Physics Forums.

For this, Can someone please tell me what tolerance means in this context? Many thanks!

I have tried to subtract the two values of y for the minimum intensities to find half the wavelength but I am really stuck. Any help would be appreciated thanks

Hi, My name is Brandy and I am a biology major and a sophomore taking intro to physics this summer! i am excited to get to know the community.