Opinions Definition and 189 Threads

TL;DR Summary: The thread: Can Any Country Achieve Net Zero Without Nuclear? Reference: https://www.physicsforums.com/forums/nuclear-engineering.106/ As new OP and ignorant of current nuclear technology's science and politics, the discussion in the Australia nuclear power thread was...

TL;DR Summary: Here I am asking for some opinions and recommendations for mathematically rigorous books that should be taken as an interested physics student. I know the question is quite subjective but any insightful answer is appreciated. I am willing to join undergraduate physics classes...

Along with a lot of other people, I chose to use Apple iCloud without thinking too much about what it can do for me. iCloud offers Synching and I pay £6 pm for 2TB of storage. iCloud gives synching on your boot drive and you can only use the remaining space with zip files. But is Synch actually...

The note is entitled: Evaluation of a Class of n-fold Integrals by Means of Hadamard Fractional Integration. 4 pgs pdf format. I assure you that you need not know anything about fractional calculus at all to understand this note that Howard Cohl helped me with. We only use a single...

Spin Launch is a proposed method, as a first stage for launching small payloads into orbit, using a slingshot method. There seems to be a video of a successful one-third scale test. Would the numbers add up, though and would it be better than an ordinary first stage vehicle? One advantage could...

Hey everyone I am looking at an older home to buy and wondering how much of a pain in the butt it would be to extend the garage out wider vs just building a secondary garage? Attached is a picture for reference :smile:

I recently noticed that "General Relativity: The Essentials" by Carlo Rovelli has been published. Based on the description, table of contents, and the Amazon reviews, it seems to me that it might be a spiritual successor to Dirac's "General Theory of Relativity." Is that an accurate assessment...

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...

I've written a Statement of Purpose for Physics PhD applications, and I wanted opinions on it from as many people as I can, which is why I am asking here. Honest reviews and tips on how to improve it are really appreciated! When I joined <my uni> as an undergraduate student in Physics, I had...

So I have a friend who thinks I'm arguing whenever I state my opinion and explain my opinion. For example, he said he was ugly and I was telling him that he's not ugly and that people are beautiful in their own ways, he disagreed, so then I also pointed out some of his features that are really...

What are your opinions on Barry Simon's "A Comprehensive Course in Analysis" 5 volume set. I bought them with huge discount (paperback version). But I am not sure should I go through these books? I have 4 years and can spend 12 hours a week on them. Note- I am now studying real analysis from...

I live in Pelham, NH - where COVID-19 is almost, but not quite, under control. And I have been talking to people who oppose using masks - or only use it because of social pressure. At this point, my "N" is only about 5. But there seems to be a pattern. They are people who never really made it...

Hi. I am going to enter uni this October as a first year physics major.One of the first courses I will take is Vibrations and Waves,and the recommended materials are as below: French,Vibrations and Waves Pain,The Physics of Vibrations and Waves, 6th Edition According to Amazon's review,there...

Hello I have some awesome rocks that I have a strong gut feeling could possibly be of some value. Pennies for your thoughts please 😊 👽🌜

Hey fellow nerds and geeks! I'm working on a new version of my compiler, mainly to improve performance on the compiler itself as it was my first attempt at such a program. Since I've learned a ton on compiler design (probably not the best of methods, but hey, it works, right?), I've built a new...

I've come across a few different videos from this person and I'm curious if they are accurate enough to rely on.

The bridge sections in photo are being welded / bolted ? together on site. Is this going to be structurally strong enough for a pedestrian bridge ?

Hi, Sorry, I had to pick a prefix but please feel free to reply as you see fit. I just joined to seek opinions on various things and hopefully learn some other things as well. I am a retired GIS analyst programmer. Completed 1st level multistrand science and maths in high school 1976 but...

Anyone completed IA Maron Mathematical Analysis? Anyone like it?

I am a university student studying physics hoping to chase a career in the field. But recently I discovered my love and talent for explaining science in a basic level people who have no idea what it is that they understand, I also like convincing some unbelievers that science works. Then even...

This is question that can't really get a precise answer without significant modeling or experimentation, but I'm wondering what folks' intuition might be on an answer to the following setup + question: Suppose there is a steel tank made of steel pipe with walls about 0.25 cm thick, internal...

Hello! I don't really know how High School ends in other countries but in Sweden it ends with an examination project depending on the programme you've selected. Anyhow we were free to choose one research topic that is related to mathematics, physics, biology and chemistry. I choose the brain...

Anyone read the book Advanced Quantum Physics by Hans Paar ? Is this somewhat analogous to Sakurai's advanced quantum mechanics? If anyone used it, can youcomment on what you used it for (e.g. was it a bridge between QM and QFT)? I happened to see this book on amazon and from the excerpt, it...

Hi all. I'm reviewing my daughter's science homework and I disagree with how things are being presented. I wanted some feedback from everyone here to get a sanity check on my own thinking. The exercise is this: answer whether these properties of matter are either an observable property or a...

Hello, The Nobel Prize in Physics is upcoming soon and I wanted to hear your opinions and expectations about some important discoveries or inventions which might end up receiving this most major prize in science. I look forward to hearing your thoughts! Thanks.

Hello, I have heard that the 2017 Nobel Prize in Chemistry is going to be announced in the next few months. Do you know about any interesting and/or useful discoveries that chemistry achieved worth the Nobel Prize in your opinion? Thanks.

I have this nice little ED80 OTA and it gives smashing images. I want to use it for terrestrial viewing. Are there any opinions about the Amici (roof) prism type erecting diagonals? I can't find much in the way of diagrams of the optics; the only one I found shows a 90° version, which is not as...

I have taken a couple of graduate level courses in quantum mechanics and I have decided to read Sakurai's Modern Quantum Mechanics from cover to cover, partly because I liked his style and I have heard a lot of people talk highly of it. But I recently realized that the second edition of the same...

I am interested in experiences with the Open Stax textbook for AP Physics.

I feel like asking about USPEX is already too specific,so I just want to see what people think of it. How do you think it compares to other methods of predicting crystal structures?

This isn't really science, or maybe kind of on the fringes of it, but recently I've been looking into GIS as a career and was wondering if anyone knows anything about it. I only recently started researching it so I'm still not very familiar with what kind of work a geographer could expect to do...

Hi I am going to be getting my A levels through an Online service, as no college in my area does over age A-levels. I started my A levels in sixth form but got hospitalised through illness for a few months. Never got to finish because of it and when I got out I was still to ill to return. Now...

I cannot conceive of time as an actual physical existence. What are the current opinions on what time is?

I just came upon this sensor, in a new(?) camera by Sigma. It seems to be a clever idea. As anyone here got any special knowledge of the device or the technology? It solves a number of problems but, no doubt, introduces some new ones. Incredibly high res! I will stick with Pentax until I become...

Hello everybody, After Googling a little I find very few scientific critiques on SpaceX "technology". Let's forget about economics and purpose. Just the engineering factors. To make a rocket landing on end seems preposterously wasteful (fuel weight) and complicated (engine trust and...

Recently at a second-hand bookstore, I found this McGraw Hill text for only $2 dollars, so naturally I had to buy it (any 500+ page book about physics for $2 bucks is a great deal). I wonder though, is it useful at all to someone already taking physics courses in college? Or would it just be a...

Hello again, I would like to know what your opinions about this book. As I have figured out, there are a lot of great GR books out there, but this very rarely gets any mention in forums like this. Why is this? Its got pretty good reviews at amazon and goodreads. Thanks in advance!

Greetings Physics Forums, I would like to propose a funding scenario; please tell me what you would do. You have been accepted to graduate school with six years of fellowships (3 through NSF, 3 through the school, though the latter are actually 9-month periods). As an entering first-year...

Hi guys, So If any of you aren't familiar with the Fermi Paradox, I highly advise you read about it. It is easily one of the most interesting topics I've come across. IF you can't be bothered for this I have included a small summary of what the Fermi Paradox in my survey (see below). I'm doing...

I have a cad project where i have to make an assembly of a mechanical device with 5-8 parts and I also have to make a modification to the device. I was thinking maybe a brake caliper but I am just curious what some of you think would be a good device to model?

Recently, I have been looking into more effective methods of harnessing nuclear power and making an attempt to move away from conventional steam plants and the use of turbines, thus reducing heat losses, maintenance and construction costs, etc. That being said, my current concept uses a...

Greetings all, Are there resources around to help with writing essays for graduate applications? I have asked a few professors around my department, but as we don't have a graduate program and most of them are young professors who have only recently left grad school themselves, most of them...

While researching possible culprits of dark matter, i had a curious thought. What if the emmited light from stars and galaxies effected the curvature of space without measurable mass. One google later i discover that this was asked by several other researchers on it but i couldn't find much or...

1. Homework Statement (Uploaded photo from Zettili Quantum Mechanics - Chapter 3 - Solved problems 3.4 and 3.5) Check at problem 3.4 the relation that he gives between operator A and state φn. Now check the relation that he uses in problem 3.5 between A and φn again. They are different while on...

Hello everyone, my name is Evan operating under 'thenoobie001'.[this is also my xbox gamertag if there are any CoD fans out there :)]. I have recently joined this site and I anticipate that I will be doing a lot of forum searching and reading here at the beginning of my membership since my...

I recently finished listening to the audio-book of Evolving Ourselves, and I really enjoyed it. I have, however, heard that some of what was in that book is somewhat controversial, so, for anyone who has read this book, I am very curious to hear what people more learned than me think of this book

I work at an auto dismantler (wrecking yard) in CA and the regulations for storm water runoff are getting tighter and tighter. The owner of the business is probably farther ahead of most yards in the state when it comes to trying to do the right thing. Our biggest concern is the heavy metals...

Good morning all, I wanted to get some opinions on the following situation. Feel free to share. I often encounter pages on social media such as Facebook where channel owners/moderators label themselves as "scientists" (without any kind of academic degree) or as people "doing science" without...

Officer proton is chasing a faster than light neutrino but the neutrino had already passing through him yesterday. Muuuuoooon!

Please note that I am not asking how to do this question. It is not homework. :) This is part of an externally set exam that some of my students sat, and with which I am disappointed with the "officially" correct solution. To me the solution is reasonably straight forward, however many people...