Young Definition and 189 Threads

My understanding is that quasars are galaxies that are billions of light years away. Thus we see them as they were billions of years ago when they were much younger than our own galaxy & other galaxies nearby to us. The immense energy they emit is generated by matter falling into the central...

I'm an Ghanaian-American 14 year old and since I was 8 I've wanted to become a biomedical engineer but as I did more research I am much preferring Physics specifically Experimental Particle Physics but I don't really know how to get started so does anyone have advice of how to get started in physics

Hi everyone. I'm a twenty-four year old and I just finished college with a degree in biochemistry. I wanted to get into graduate school but I didn't get get in. I was thinking of working for a year and applying again but part of me thinks I'm not ready for more school. I love science but I...

Saw this article posted on facebook, http://news.nationalgeographic.com/news/swapping-young-blood-for-old-reverses-aging/ and one of the papers they refer to, http://www.nature.com/nm/journal/vaop/ncurrent/full/nm.3569.html What do people think about this? I thought the affects of...

I have basically two doubts regarding diffraction and interference. First of all, according to my CIE A level Physics book, while the double slit experiment results in fringes that are more or less equally separated, a diffraction grating results in fringes that are not equally separated. Why is...

All over the news we see the results of the recent detection of gravity waves from the early universe. Which got me wondering: The early universe was much more dense than at the present. It therefore seems that spacetime was much more curved than it is, on average, today. Is this...

Hi all I am looking for the intensity of the fringes on the screen behind two slits with a given width. I thought it would be easy to find with google but no.

I have an insane hypothetical question about energy and spitting atoms. I am currently writing my first novel in which my main character has the ability to control and manipulate energy. My hold up right now is what would happen if said character were to split a hydrogen atom with her mind. My...

I'm curious which kind of fossil energy sources could one find on a young Earth-like planet which is in its equivalent of Cambrian era. Yes, I understand it's clearly too early for mining carbon. So presumably peat instead, right? What about oil or natural gas? (EDIT: including more exotic...

This is probably really bold by some members standards, but I would like some help. If I send someone who has engineering experience my resume would you mind critiquing it...please :) I'll return the favor somehow.

Hello everyone, I am 17 years old now and my ambition for the future is to become a theoratical physicit .Many people including my family members told me it is very hard and need high level math and physics skills . Thus,I have decided to improve my math skills at home and not only depend on...

I would like to be a physicist and hopefully one day get involved in particle physics or theories of quantum gravity, but I am not a savant and couldn't solve different equations by the time I was four years old. I have only taken up to pre-calculus math classes. I was supposed to graduate at...

Homework Statement A marble column with cross sectional area of 45cm^2 supports a load of 8.5 x 10^4 Newtons. The marble has a Young's modulus of 5.5 x 10^10 N/m^2 and a compressive strength of 1.8 x 10^8 Pa. If the column is 2.75m high, what is the change in length of the column...

My questions: (in order of attached images) 1. Why doesn't the vertical component of P affect the mass of the lawnmower? Why isn't the mass = mass of lawnmower + (Psin40)/g? 2. This question, I totally have no idea how it should be calculated. I tried by labelling the weight at the exact...

Quoted from my book: "The graph of ΔL against F has gradient L/EA, so the Young modulus E is equal to L(A x gradient)." E is (stress/strain). I don't understand that sentence. If I substitute the gradient into E= L(A x gradient), then E= L(A)(L/EA) E= L(L/E) E= L^2 /E E square = L square...

Question 1: --> Why both the wires are suspended from the same rigid support in this experiment? Question 2: -->Why both the wires are taken of the same material?

Author: Hugh Young, Roger Freedman, Lewis Ford Title: University Physics with Modern Physics Amazon Link: https://www.amazon.com/dp/0321501217/?tag=pfamazon01-20 Prerequisites: Calculus

Homework Statement Consider the irreducible representation V in the symmetric group S_5 corresponding to the Young diagram (these are meant to be boxes): [\;\;][\;\;] \\ [\;\;][\;\;] \\ [\;\;]\;\;\;\; (a) List all standard Young tableaux of the given shape (that is, list all the possible...

I'm 16 years old male, and I noticed last year that my hair was thinning. I do not know if it's because of my dry scalp or because of the shampoo I'm using. Is it normal to have thinning hair at this age?Can I regrow my lost hair? Also, how can I get rid of my dry, itchy scalp? Thank you.

Hello, Im Mike. I am only 14 but I am deeply in love with mechanics and design. I just wanted to share my future plans and am wondering how possible this is. I am not sure if i should be posting this in the aerospace engineering forum but here it goes... My father is in the AirForce and has...

I am a recent graduate with my BS Chemistry degree. Because I did not want to move and some other factors I do not care to discuss here I ended up in a less than desirable position at a local analytical laboratory. I log samples and deal with customers. This saddens me because not only is my...

Does anyone know of any books that will get younger people (teens/pre-teens) interested in physics (or science in general)? Maybe something like Feynman's 'Six Easy Pieces'?

Hello I took a general physics course 2 years ago, and now I am trying to refresh a bit on my knowledge of physics so I started solving discussion questions+problems in University physics by young My problem is I can't verify my answers nor can I look for the correct answer if I don't know...

Homework Statement A three-legged stool has one leg of aluminium (E = 7 x 1010 Pa), one copper (E = 11 x 1010 Pa) and one of steel (E = 20 x 1010) Pa. The legs have the same dimensions. If the load on the stool is at the exact center, a. Which leg is under the greatest stress? Explain why b...

Hello, I'm majoring in physics and I'm starting my first physics course next semester. I'm pretty scared and I don't know what to expect. So I just wanted to know what I can start working on and what should I expect.

I currently have College Physics by Young/Geller. My friend (who is superb at physics) told me that that book is not good and University Physics by Young/Freedman is a better choice. I would really like to know what is the difference between these 2 books? Should I invest in the Uni Physics...

[Sorry for posting this here, apparently posting this here and notifying the mentors is the expected way to do this as I can't post directly in the Learning Materials area] Curious if anyone has reviewed the latest Knight book "Physics for Scientists and Engineers: A Strategic Approach with...

Hello all! Clebsch-Gordon Coefficients tell us that in an SO(3) representation 3 x 2 = 4 + 2 (x/+ is the tensor product/sum). In practicing my Young Diagrams I tried to re-create this calcuation, but can't seem to figure out how to draw a doublet. I would appreciate some advice! (The triplet...

I'm an old white guy who lives in a gated community in Florida. I couldn't sleep the other night, so I went out for a walk. I'm always armed, but rarely with a gun because I'm well trained on how to do great harm with what I have. I saw a young black man of about 20. So I went up to talk...

Many years ago I was taught Young tableau but I can't for the life of me remember how to do it, but now I seem out of the blue to need a Clebsch decomposition! Does anyone who is nifty at these things know what the decomposition of 3x3x3x3x3* is in SU(3)? (FWIW, the reason I'm asking this...

"Jump Efficiency Theory". I am young so please no mocking. This is a theory i have created that judges how efficient a jump is with respect to a specific distance. This theory is going to be used mainly for the Long Jump sport. For example let's say you have to jump across a whole with a...

I am working on all of the problems from Georgi's book in Lie algebras in particle physics (independent study), but I am stuck on one of them. The question is the following: "Find (2,1)x(2,1) (in su(3) using Young tableaux). Can you determine which representations appear antisymmetrically in...

Hi, dear all, Recently face some controversial issue with my supervisor and i cannot convince my self too. is it time varying elastance equal to time varying young modulus? Young modulus unit is Pa, however, elastance value is mmHg/ml, is both of them are equal? Young's modulus, also...

"In his studies on Fourier Series, W.H.Young has analyzed certain convex functions \Phi:IR\rightarrow\bar{IR}^{+} which satisfy the conditions : \Phi(-x)=\Phi(x), \Phi(0)=0, and lim_{x\rightarrow\infty}\Phi(x)=+\infty. Then \Phi is called a Young function. Several interesting nontrivial...

Homework Statement length: 15 cm Δlength ? diameter 1.3 cm pressure 17795 pa γ= 2.0*10^11 Nm^2 Homework Equations ΔL=γLA/F The Attempt at a Solution i could not find the answer don' know where to place pressure

Hello my friends! I'm trying to learn the meaning of young diagrams from Christoph Lüdelins physics751 (google it :) but I can't figure out what is happening in eqn 4.14. I understand why 4.13 are the possible p-cycles but how does eqn 4.14 apply to this S_5 example? (Sorry that I could not...

I am trying to recreate the Young double slit experiment at my house with a laser. You could call it a homemade experiment I suppose. My question is if I use a laser pointer for my photon source what would I use as the photon detector. I want to have some sort of screen that can detect the...

Hi Friends I am a young Bangladeshi and a freelancer. I want to gather and share knowledge here.

Homework Statement Upon using Thomas Young's double slit experiment to obtain measurements, the following data was obtained. Use this data to determine the wavelength of light being used to create the interference pattern. DO this in 3 different ways! The Angle to the Eighth maximum is 1.12...

Recently I have been feeling fairly depressed about my future in the mathematical sciences. I am a second year undergraduate studying mathematics and physics (double major), what is more, I am almost 21. In hindsight I wasted a year traveling with friends after high school, and whilst I enjoyed...

Thought some people here might enjoy a little video we made: For context: Everybody involved in this project, in front of and behind the camera, is actually a theoretical physicist. This should obviously be taken as tongue in cheek, and it is not directed against string theory in...

Am I being lulled by a basic text? I am re-studying basic physics and calculus for a run at a physics degree. I am using the Stewart text for calculus and I find it challenging. I am using the Young and Freedman physics text, and I find the calculus-based portions incredibly basic. I am...

Hi I am trying to get the errata for "University Physics with Modern Physics by Young and Freedman 12th edition" I couldn't find it on publisher's webpage. :mad: Anybody has it ? thanks

hey guys, i want to to know why the fringe width in young double slits experiment is λ thx

Homework Statement Calculate the stress in a wire of diameter 0.35mm when the tension in the wire is 50N. Homework Equations Stress=F/A The Attempt at a Solution 0.25/2=0.125 0.125/100=1.25x10"-3 Pi x 0.00125"2 = 1.542x10"-5 50/1.542x10"-5 = 3242542.153 Pa Are my...

I am a second year student of engineering at a Canadian university and am very interested in mathematics and education. I feel like the methods of teaching math in high school and early university (I have no experience with senior university classes) are not only an inefficient use of the...

Hello there, I'm trying to find out if anyone has specific experience with the international edition of University Physics With Modern Physics by Young/Freedman. I know that usually international textbooks have the same content as the U.S. but I'm worried that the units in this will be in SI...

I want to know what kind of manipulations can be done to decrease the distance between fringes. the activity is done with a laser. I am basing my conclusions on this equation delta x= (L)(lambda)/d here's what i am thinking, decreasing the wavelengths will decrease the distance...

Homework Statement I was a asked a question from an experiment: What happens if the light shone into the diffraction grating or a double slit is not perpendicular to the diffraction grating or double slit? What will happen?The Attempt at a Solution Straight away i can tell that the light...

I will give you a little background about myself, if you don’t care skip down to the bold part. I am an actuary with a B.A. in mathematics, but I have always wished that I would have perused a career in academia. Growing up I did not have the best guidance, father was not around, mother working...