Important Definition and 498 Threads

Of these twelve candidates, please choose the paper or papers which you think will contribute most significantly to future quantum gravity research. Since multiple choices are possible in the poll, you may select several papers. Abstract summaries follow in the next post. Holonomy...

Question 1: A pressure gauge has accuracy equal +/-2% of full scale. The gauge range is from 0 to 100 kg/cm2. When the gauge indicate 50 kg/cm2 What is the tolerance of this indication? a) +/- 2 kg/cm2 b) +/- 10 kg/cm2 c) +/- 1 kg/cm2 Question 2: An instrument system consists of...

I consider it important, but I would not like such importance is abused for different purposes than educating one to be a good human for a small community, at least and education costs too much. I would like to decline and completely quit "high" school. If I turn out to be your problem, then...

I've got one more semester left finishing up the periphery work before I transfer to a school with an EE degree to begin the core work of a program. I'm right at Georgia Tech's doorstep (although I wouldn't be able to live at home with the parents), but I don't know if paying for GT is a...

Hi, I had a question in my exam at my college that I did not quite know how to answer. Why is the study of magnetism more important than of electricity in technology ? (I can't remember exactly the question)

How important is a solid (or better) understanding of Logic, especially Symbolic and Mathematical, for an aspiring mathematician? For a physicist? Other scientists? Are there variations in how important it is for Analysis, Topology and Algebra? A mathematically inclined physicist told me...

I really need your opinions on this, quick! I want to complete my PhD in Astrophysics and enter into research in the field. I still have a long way to go (my undergrad classes only start after two months!) but I want to be prepared. Frankly, I have absolutely no interest in chemistry, and I...

Awhatup, I'm currently doing an honors specialization in physics at a Canadian university. However, I initially came to university to study biology and medical sciences. Because of this I didn't enroll in the linear algebra course that is needed for my program, and will therefore have to do...

Why do we carry out stress transformations? tnx

The title says it all. I'm doing a presentation on ZnO nanoflowers, and one article says that the bandgap of 3.3eV in combination with the high exciton binding energy of 60meV makes ZnO promising for optoelectronic applications. The bandgap I understand, what property does the exciton binding...

When did statistical studies become important for the study of physics? Could someone cite something for me to read which would put this question in a historical context? I’m doing research on Arpad Elo (1903-1992). He did a master’s degree in physics (I assume before 1926), and then...

Homework Statement A 0.2 baseball if pitched with a velocity of 40 m/s and is then batted to the pitcher with a velocity of 60 m/s. What is the magnitude of change in the ball’s momentum? A. 4 kg*m/s B. 8 kg*m/s C. 2 kg*m/s D. 20 kg*m/s Homework Equations change in momentum =...

Homework Statement Let f be continuous on [0,1] and let R be the triangular region with vertices (0,0), (0,1), and (1,0). Show that double integrals of f(x+y) w.r.t dA over region R equals single integral of uf(u) w.r.t du from 0 to 1.Homework Equations jacobian method The Attempt at a...

All reversible cyclic processes (engines) have the same efficiency: 1-T2/T1. And Carnot demostrated this efficiency with the Carnot Cycle and went on to use this to demonstrate that this was the upper limit for efficiency. My question is, why is it that there is such importance placed on...

I am a petroleum engineering major taking a Calculus III course this fall online. Either the final exam can be worth 40% or it can be worth 30%, but that other 10% would go toward online homework assignments completed with Maple. I do not have Maple and am not on a university campus. Would it...

So, I know that spin is very important in quantum mechanics/elementary particles. But just what is spin, PHYSICALLY? Is it the way a particle rotates (spins)? The direction? The velocity at which it rotates? What does it mean for a particle to half 1/2 a spin and the other to have spin 1? Does...

first: i want to put a dc input on a switched capacitor integrator how can i do this second i make a sigma delta modulator and iwant to put the dac in the integrator and make the feed back bits to control the switches how can i do this please i want anyone to replay to me

Haha I hope this doesn't come off as one of those, "has this B ruined my chances at grad school?" kind of posts. I've kind of taken an odd path through my first three years of undergrad, and just finished my school's second year calculus portion, but I've also gone through group and ring...

Multiple choices are possible in the poll, so please select several papers if you wish. Of these twenty candidates, choose the paper or papers which you think will contribute most significantly to future quantum gravity research. Abstract summaries follow in the next post. Diffeomorphisms in...

A friend of mine has a job interview tomorrow with a prestigious company. She is almost guaranteed the job because she's good friends with one of the hiring managers. Her current job has no room to grow, pays below average and has no benefits but she has pretty much made the owner stress free...

I was wondering this today. has it almost become necessary to have publications to get into grad school? I was talking to a grad student today who got denied by state schools with a 3.5 or 3.6 GPA, and no publications. I have plenty of research experience but as of yet have no publications. will...

Greetings, I had an argument with my substitute Physics teacher about the use of the transistor and how important it is/was. Basically, we were debating whether or not it is important because of the invention or whether it was purely the concept that made it so important. His argument was...

Hi all I have applied to University to study EE in September. Are there any specific areas of maths that you would recommend concentrating on over the summer? Any help would be much appreciated! Thanks Mark

I've just watched this vid about rotations and torque: http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/video-lectures/lecture-21/ and they say that if u hit or pull something for a corner for example.. it will have the same speed like if u hit it in center...

If i find interest in it, would it make it easier to understand? If so, what are some ways of forming interest? I usually just study so as to pass a test.Which hasnt worked well for me. I just do enough to so that i can solve problems that will be similar to tests

My car currently veers to the right pretty heavily. I need to have the wheel turned very slightly to the left at all times for it not to run off the road. It's been that way for several months now and I'm not too bothered by it. However I just saw my shop has a deal to fix front and rear...

I'm trying to decide whether i should dedicate my studies to math or to physics. I find that physics is utterly fascinating and tends to excite me more than math. But when I'm studying, i actually enjoy doing mathematics more than doing physics. So I've narrowed my decision down to the...

Gravity is important over long ranges as it is always attractive. Gravity has an analogue to magnetism called gravitomagnetism. Is it always attractive? Could "dark matter" or MOND be explained as gravitomagnetism? i.e if gravitomagnetism is always attractive and additive, what is its...

Line from the movie Airport, circa 1:20:40. I used to fly planes, so I understand getting the mission done is more important, but on rare occasion, saving lives was more imperative. I'm concerned about these copycat killings/terrorist actions, but what to do? 99% of most ideas aren't...

Homework Statement The first chapter is talking about how they brake up a degree into minutes and minutes into seconds... Is this concept important to understand. And how will it help me with other harder trig problems? Homework Equations The Attempt at a Solution

Hello - I am a 16 year old danish boy. I'm in what is equivalent in denmark to the 10th grade in the US, and i simply love math. It's funny though, since before i attended 10th grade, i dreaded math due to it being so boring - but i think that was due to the simple arithmetics we did in my...

Is it at all possible for the crystal sugar from one package to be qualitatively different from crystal sugar from another package (brand, etc.)? In other words, if I need sucrose for an experiment, could it affect the results if I use crystal sugar from different packages or of different...

What spacetimes do you consider to be important or interesting? Important or interesting as solutions to the Einstein field equation, or important or interesting geometrically. I'll start the list. Minkowski Schwarzschild (including extended) Kerr(-Newman)...

In particle physics if you take a "elementary particle" and collide it with another specific elementary particle it produces a set of elementary particles, but if you take those same two particles and increase their speed or the amount of energy behind them they become productive and produce...

Of these fifteen candidates, please select the paper or papers which you think will contribute most significantly to future quantum gravity research. Multiple choice is possible in the poll, so please choose several if you wish. The papers' abstract summaries follow in the next post. Big Bounce...

Hello I am new to this forum and was not sure where to post some thoughts I have. First of all let me compose why I even care to consider the question of consciousness. I want to first stress I do not have an education in Mathematics or physics. Also am not a good typer. Thank you ahead time for...

i like limit, continuity,differentiation in real analysis, they are interesting, but i don't know what is their importance? And about lebesgue integration, i don't think it is interesting, and it seems it is useless

I am trying to analyze a junk of landslide data (landslide @ different locations) to see which factor has the most effect on landslide, that includes slope angle, rainfall intensity etc etc, which sums up to 7 to 8 of them. I am wondering which kind of analysis I should adapt in order to do...

I am trying to analyze a junk of landslide data (landslide @ different locations) to see which factor has the most effect on landslide, that includes slope angle, rainfall intensity etc etc, which sums up to 7 to 8 of them. I am wondering which kind of analysis I should adapt in order to do...

Why is it that an antenna length must be somehow proportional to the wavelength of the frequency

As someone who has studied little about this subject, I'm posting a naive question. Given that most natural phenomena occurs far away from phase transition, why are people so interested in the tiny region around phase transition? Why are critical phenomena considered so important and...

Pretty much what the thread name is asking. How important is a PhD for a career in Physics? Also, are physicists employed in the solar or nuclear industries? What are the prospects of getting a job in these industries like, and is a PhD vital for these careers? Thanks, Justin.

At what length scale do quantum effects become important in gravitational calculations??

So I'm a physics student interested in taking some systems/signals classes through the EE department at my school. There are 3-4 separate classes I'm interested in taking: continuous systems/signals discrete systems/signals digital signal processing digital signal processing lab I'm not...

Homework Statement After todays exams, I'm having a few well deserved beers with a friend. We are pondering about some things we're not competent enough to comprehend (I'm a journalist and he is an architect). 1. e = m*c² -- how does lightspeed come into this equation, and why is it squared...

Hi, I have to pick one of these great scientists to write a middterm item on, so basically I'm curious about what you personally think would be the easiest answer to argue to this question: Which out of Galileo, Kepler or Newton was of the greatest significance in changing the scientific...

Of these twelve candidates, please select the paper or papers which you think will contribute most significantly to future quantum gravity research. Multiple choice is possible in the poll, so please choose several if you wish. Tennie Wohlfarth Consistent matter couplings for Plebanski gravity...

My syllabus doesn't include them in first physics course, and I am in engineering major. Should I try to practice them for myself or are they not very important?

Hi I'm a complete n00b at calculus (first day of the first year) so this question may appear a little...stupid. But I want to hammer into my head every little thing I hear in the lecture hall, so I might as well give it a go. Today the professor explained how jump discontinuities must be...

hi, i am a freshman and i really enjoy physics. With other homework like programming, biology, or english (i hate english) i seem to be aware of the time spent doing the problems and studying from the textbook, but when i do physics i loose track of time and i really enjoy it. I am pretty good...