Theoretical Definition and 999 Threads

Homework Statement Water in rock crevices often causes erosion when it freezes, given it expands and exerts pressure on the rock. What is the maximum pressure that water can exert when it freezes? T = 263.15 K dice @ 263.15 K = 0.9 g cm3 dwater @ 263.15 K = 1.0 g cm3 Homework Equations...

What kind of job can you get as a theoretical physicst?

Hi, right now I am a grade 11 student in Ontario, Canada. I've been captivated by theoretical physics for some time now and I really want to try persuing a career in it (ideally in string theory/ other beyond the standard model stuff but anything in quantum mechanics would still be great). So my...

I'm looking for graduate courses with focus on non-string theoretical physics beyond the standard model (or at least, courses preparing for research in that field). I'm also open to string content, but I find other approaches more intriguing. Recently I came across Imperial College's MSc course...

V is a space of inner muliplication. W1 and W2 are two subspaces of V, so dimW1<dimW2 prove that there is a vector 0\neq v\epsilon W_2 which is orthogonal to W1 ??

there is A\epsilon M_{2x2}(Q) I am given that A is diagonazable prove that A) A^10+12A is diagonizable too B)give an example for a matrix B\epsilon M_{2x2}(Q) that is not diagonizable,but b^2 is diagonisable ?? i know that the eigenvalues of a matrix are the same as for every matrix...

there is a space V=Q^4 over Q . there is a series of vectors (v1 ,v2 ,v3,v4,v5) that spans V does the series (v1 ,v2 ,v3,v4) is a basis of V? if it is explain if not give a counter example?? we could have that v5 is a linear combination of others. ??

there is a space V=Q^4 over Q (i thing Q means rational) there is a vector series v with length 6 on V does v linearly independant? if it is explain is not ,give a counter example ?? Q^4 means we have 4 coordinates in each vector but v has vectors with 6 coordinates so i...

Homework Statement 1. Folk wisdom says that a cat always lands on its feet. If a cat starts falling with its feet up, how can it land on its feet without violating the law of conservation of angular momentum ? 2. Is it easier to crawl radially outward or radially inward on a rotating...

hi to all i read stuff on theoretical physics especially GUT's and also read littlephilosophy but i keep wondering why is it that people even study these things when we all know that they will have close to zero applications in the real world. also money is spent on all these things like the...

Hi, I have a few questions that I am struggling with. Any help would be greatly appreciated. Question 1 Calculate the molar mass of calcium chloride dihydrate, CaCl2 • 2H2O. Please use the Periodic Table values rounded to the hundredths place for your calculation and round your answer to...

I have to choose what I want to do in university and I was wondering how smart you have to be to do theoretical physics. I do maths , applied maths and physics in school and I'm good at all of them. Any help is very much appreciated.

Homework Statement I'm new to this forum and I'm not very sure with how I'm suppose to state my problems, thus if it's written wrong please tell me so. I'm currently doing a motion lab report for my physics class and we have to analyse the motion of a pendulum. The material used for the...

I am a 25 year old high school teacher who wishes to further his understanding of physics to a point where some recent papers on theoretical physics can be read and understood. I graduated with a mathematics degree around 4 years ago and regards myself as fairly talented and able with...

I'm an UG right now, but I plan on doing research in theoretical physics (probably particle physics. I want to work on finding a TOE. Possibly QM or QED instead). Which schools are best for these pursuits? Thank you.

I was wondering about a question that popped into my mind recently -Let's say, theoretically, a device existed that could reverse the force of gravity somehow, to the point were it created antigravity. Since black holes are held together by their own gravity, pushing molecules closer than...

I'm a 32 years old teacher in mathematics and physics in a high school, and I obtained a first class BSc (Hon) in physics a couple of years ago, which was emphazided on theoretical physics in terms of option courses. However, I have always wanted to gain an MSc and, if possible, a Phd in...

Has anyone read this book? How is it?

Hello, do you know any websites on the internet with exersices and solutions in theoretical physics? No matter which Topic. Mathematical methods, Mechanics, Elektrodynamics, Quantum Mechanics,... thanks greetings

In an experimental scientific research process, you could state the hypothesis and the methods you would use to conduct the experiment. The experiment gives you data. Then you use statisitics to check whether the data disproves or is unable to disprove the hypothesis. However, in a theoretical...

I kind of doubt that I have the intelligence to become a theorist but let's just pretend for a minute that I do. How much math would I need to learn? So far I've completed multivariable calculus and linear algebra and the only other math course that I'm required to do for my physics major is...

When defining voltage we define it with respect to infinity. However sometimes we also refer it with respect to earth. What is the difference or similarity between these? When considering the capacitance of a single sphere should we consider Earth or infinity as the other plate? What is the...

Here it goes: You purchase a cup of coffee at Dunkin Donuts. The coffee is about 90deg. in a styrofoam insulated cup. The main question is: Should you mix your cream, which is about 5deg cels, in the coffee at dunkin donuts or wait til you get home? The temperature outside is about 25deg...

Einstein espoused in many of his essays the opinion that there is no logical and direct path from from the world of experience to a set of concepts to describe and understand/organize that experience. The concepts and ideas that we use to describe nature are free creations of the mind. For...

Does gravitational acceleration have any effect on the frequency of a standing wave? I suppose it does-it probably affects the speed of the wave by hindering wavelength. So, if we went to the moon, and the gravity was considerably less on Earth, would the frequency of a standing wave be...

I'm a second year undergraduate at UChicago, and I plan on doing graduate work in theoretical physics. So when the time comes, to which graduate program should I apply: mathematics, applied mathematics, or physics? From my research, it seems that the answer differs by institution. For example...

Can somebody give me an idea what you get upto on a day to day basis? I know roughly what you work towards in a PhD, obviously it depends on your topic, but I have no idea what it consists of day in and day out. For example, what maths do you do daily? What theory do you do daily? How much...

i really enjoy my physics and applied math classes and wish to pursue a career that uses them, while also staying employable at teh same tiem. i hate experiments so i don't want to be an experimentalist or engineer, unless the engineering is theoretical. i know there's plenty of...

Given the recent discussion/demonstrations of sailing downwind faster than the wind I was wondering if anyone has some ideas about the limits (either theoretical or practical) of sailing upwind. I was thinking in particular of a turbine driven vehicle going directly into the wind but I'd also...

Homework Statement I have made a picture af a circuit that you can see in the attachment. My teacher told me that at the points (A,C) and (B,D) the voltage (potential) is equal. Because of that there won't be a current between A and C and B and D (Ohm's formule) However, he has made an...

I've always wondered what a day in the life of an academic is like, particularly mathematicians, philosophers, and most of all theoretical physicists. So what's an average day like for a theoretical physicist? Do you sit in your thinking chairs, lost deep in thought, trying to unwind...

I'm planning to apply for a MSc studies in Theoretical Physics. I found that LMU and Utrecht offer 2-year, and not 1-year, programs, which I like. What would you choose for a broader education in this area?

calculating theoretical yield of resulting alum from water dissolving...help asap! a mass of 13.02g (NH4)2SO4 is dissolved in water. After the solution is heated, 27.22g of Al2(SO4)3*18H2O is added. calculate the theoretical yield of the resulting alum (formula is...

Hi all! The prof for "theoretical methods in physics" mentioned last week the term "wedge product" but it all remained very unclear to me. I read about it in Wikipedia, but couldn`t catch it at all, cause I`m doing in the first semester now. Does anyone know where I could find it well...

Hello All i want to study theoretical physics and get a degree and then follow my post graduate studies, but i have to main problems, first is that i can't attend to much because i am working as a full time programmer so i need to find a reputable university that can offer the degree by long...

Hi everyone! I graduated with a major in theoretical physics (mathematical aspects of quantum mechanics) and I wonder if there's some sort of "theoretical human brain physics" research field, and where in the world would be possible to pursue a phd degree in that field. Also, any...

Hi everyone, I'm applying this year for a snazzy 2 (maybe 3) year scholarship for graduate study at Oxford. I want to study gravitational physics, getting a strong foundation in relativity and quantum theory before choosing to research black holes, quantum gravity, quantum field theory or...

Homework Statement If a linear system has the augmented matrix: a, -b, 4, 0 1, -2, 1, 0 0, 0, 4, 0 then select all correct answers: (a)The system has infinitely many solutions if b=2a; (b)The system is inconsistent if b=2a; (c)The system is consistent if b=a; (d)The system has...

We honestly haven't gone over this in class and I have no idea why my prof wants us to do this question... so I'm given it a go and come up empty. NEED HELP! Homework Statement Calculate the maximum theoretical power from a wind turbine if the radius of the vane area is 18.1 m and the wind...

Question: I know I want to do theory, and definitely not experiment. To that end, is it better to be a TA or an RA? I heard it said that being a TA is better...is this true? I was somewhat disbelieving...

At the moment, I'm doing my Master degree in theoretical physics. I'd like to do a doctoral program in the field of quantum field theory. My partner is also doing his Master degree at the same university like me (in Switzerland). He is more interested in the field of astrophysics. We are...

What's the difference between Theoretical Physics and Astrophysics? What I mean is isn't Astrophysics also included in Theoretical Physics?

how do you get the theroetical value? it's a accuracy and precision lab we basically put designated amount of water into beakers and cylinders, graduated, and measure the mass. And we are suppose to find the theoretical accuracy of each piece of quipment and the actual % accuracy for each...

I had some questions in my mind due to lack of experience... experienced people can give answers to this post... :) I often wonder, what theoretical physicists do on for years and years... Do they sit at home with a pen and paper and think? Are they focused more on academics or research...

Hi all. Starting an undrgraduate programme in Theoretical Physics in two weeks and I have to choose two modules to take for the year. These modules can be of absolutely any topic that is availible in my college, they are called elective modules. I have come to a conclusion that it probably...

I'm having to decide which degree to take now and can't really make my mind up between straight Physics or Theoretical. I will be applying to Oxford, Bristol, Manchester, Imperial and Nottingham if anyone cares. Just wondering what peoples thoughts are on the 'Physics with Theoretical...

I am 21 years old and after this semester I will be transfering to begin work on my masters degree. I have been pursuing electrical engineering but am seriously contemplating studying Theoretical Physics after I get my bachelors. My question is "What kind of job opportunities are there for...

Is there such a classical scheme? I only know of those which offer security from computationally bounded attacks.

There been some discussion about whether good at maths implies good at physics. I like to ask something else. Can someone be bad at maths but good at theoretical physics? bad obviously means not as good compared to most of the maths people. And not just bad as in knowing less but also bad as...

Hi all, I just got accepted to study theoretical physics in UCD in Ireland for the next four years. At the end of it I will come out with a BSc, hopefully. My ambition is to later get an MSc in Cambridge. I have heard so many stories about the level of difficulty associated with getting into...