Pure Definition and 482 Threads

Hello, suppose we have a sinusoidal AC source connected to only a pure inductor of self inductance L ( no resistance at all ) ..then emf induced in the inductor is L * dI/dt and is equal and opposite to the applied emf. but if the induced emf opposes the applied emf , then how can there be a...

Can anyone help me find compression test data for pure titanium? I need the stresses from 2% to 10% strain. If you can't get the actual data, a graph would be fine as well. Thanks.

As someone who's interested in the history/ideas of mathematics I'm attracted towards the pure track but I'm also attracted to the job prospects of applied math. Are my impressions wrong? Can one find employment with either concentration, or is the applied track superior in that regard?

Dear Alls, I need your advice regarding my experiment in producing the High Voltage Zero Current, Pure Electrostatic device. The Input Power/Voltage: 5 Watt/220 Volt The Output Voltage shall be 20.000 Volt The Output Current shall be 0 Micro Ampere. Please assist me in step by step...

Let's say you're getting 80-90 in the lowest class for math in high school Is there anyway for you to get into Math pure? Oh and another question, let's say a person who got a lower grade then you in Math got into Math pure. Can schools really do that?

Is it more or less than 6 hours per day?

I always get the impression that pure maths is more superior meaning harder, grander than applied maths and that the smart people on average go into pure maths. Is this a misconception? Also rarely is it that applied mathematicians switch into pure maths but the vice versa is plentiful. I do...

Hi. I have to write a paper (about 20-25 pages) and I'm likely going to choose the topic 'The Unreasonable Effectiveness of Pure Mathematics' as was suggested by one my prof's (of course, I'm familiar with Eugene Wigner's article). I was curious if anyone could point me towards more modern...

Hi, Lately I've been having second thoughts about whether I want to pursue a career in engineering or a career in math and physics and end up doing research. So here are three questions which i'd like being answered :) 1. Let's say I get a B.Sc in Mathematics and Physics, will I then be...

Hello, I just read about the the ten most beautiful experiments of all times. The top winner was the double slit diffraction by electrons experience carried out by Claus Jönsson . This electron diffraction experiment, I think, has been chosen as remarquable because it stages the...

when we say that in pure rolling the speed of the point of contact is 0 do we really mean it's just absolutely 0 or is it negligible.this may seem strange... but if it's 0 then why does that point ever move.if it ever moves then it's speed is no more 0 ...

For the last several months I've been trying to locate sulfur in bulk so I can try out something called sulfur casting (lost-wax casting using liquid sulfur instead of molten metal). All I've been able to find is five pound bags of something called soil or garden sulfur at nurseries and home...

I have recently switched from Eng Phys to Math and Phys (double honours) with minor in Comp Sc. to start in the next semester, my 2nd year. I can imagine how anyone could mention that I threw most of my chances for a normal, based on employement life. What can I say? I just couldn't help it:-p...

Results just came in. I did 2 pure maths, metric spaces 51% & algebra 59%, Partial differential equations 79% and 2 advanced theoretical physics, QM 71% & Stat mech 74% all at the third year level. The scores are exam scores. I like pure maths but find them hard. I usually have trouble doing...

In the crystallization process after gravity filtration is carried out, a mixture of ice and water is sometimes used as a bath instead of just ice. I know that the ice/water bath can be used to cool the filtrate to around 0 C while just crushed ice or an ice-salt bath may cool the filtrate to...

How would you compare applied and pure mathematics? Is one more difficult than the other? What is the general difference? What do you think is the most interesting field of those two? Can someone who is bad at using applied math, be more capable of pure math and vice versa? ("Theoretical"...

Which undergraduate pure maths subject do people find the most challenging? I thought I might just list the three major areas, analysis, algebra, topology.

Homework Statement Prove that for every k >= 2 there exists a number with precisely k divisors. I know the solution, but don't fully understand it, here it is; Consider any prime p. Let n = p^(k-1). An integer divides n if and only if it has the form p^i where 0<= i <= (k-1). There...

I want to know how one purchases pure elements. Like Caesium or Neon or Chlorine. Do you need license to purchase some elements? Or do you need to be affiliated to some sort of organization? Where is a site that has prices for the elements? Just curious how one gets a hold of these...

Hello everyone, I'm an EE undergraduate and I'm specializing in Signals and Systems. I'm also minoring in pure math. So, in the fall I have to begin a 3-quarter sequence in one of the following math subjects: Abstract Algebra Real Analysis Probability Each of these subjects...

Opinions on this "Pure Math/Finance" Program I know that most people on these boards are more familiar with physics and engineering-type programs, but who knows... http://www.math.uwaterloo.ca/PM_Dept/Undergrad/Academic/Plans/pm_finance.shtml" Does this program seem like one that'll have...

Suppose a solid disk of radius R is given an angular speed about an axis through its center and then lowered to a horizontal surface and released, the coefficient of friction between disk and surface is u. What is the distance traveled before pure rolling occurs? Conservation of Momentum...

For those of you who don't know, "Formulas and Theorems" is basically a compilation of thousands of math theorems, 6000+ formulas, with a summary of their proofs, covering most of what was known in the late 18th century. What I'm looking for is a comprehensive reference book with worked...

Can you give me a nonselfish reason to study pure mathematics? How does one justify spending an entire life pushing around symbols and definitions which may have no connection to the physical world? I enjoy doing math, but I also enjoy playing chess and minesweeper, and even if someone were to...

I know Berkeley has a slight edge in the "prestige" factor, but is this edge well-earned? Is there a significant difference in the quality of instruction and opportunities for research at these two institutions, particularly in the pure math department? Is there much difference in the...

Is it true in general that if someone who does not show any talent in maths during school (i.e. performs average in maths competitions and tests) will not succeed in pure maths research if that person chooses to do so? Hence that person is not likely to become a professor if he/she chooses to be...

Homework Statement Hey everyone. I was practicing some problems, and I came across one that seems pretty simple, yet I am having difficulty proving the answer. The question asks us to show that a state of pure shear causes no volume change in linear elastic deformation. I have a very good...

I am interested to know everyones thought's about the role of computers in pure mathematics. What is the distinction between computer science and mathematics? "Computer science is no more about computers then astronomy is about telescopes."

How would one acquire an isotopically pure sample of an element? Are some available for direct purchase, or would it have to be done in-house with some sort of large centrifuge apparatus? (Im thinking about transition metals, not actinides)

pure math in astronomy-astrophysics.Suggestions needed Hello, I am an undergraduate student of mathematics, and I'm interested in astrophysics-in a level of watching documentaries (no scientific knowledge). I want to have graduate studies, I like the idea of astronomy-astrophysics (even...

The gold nucleus has an atomic mass of 197 with 79 protons and 118N and 79 electrons. The top quark has about the same mass, but no internal structure. It's just a particle with pure mass. Why would a structure of pure mass and nothing internal decay?

does anyone know of a fast ode solver in pure C? a google search yields many solvers, but mostly in fortran...

Hi Are there any techniques out there to make ultra pure H2O? Reverse osmosis looks interesting, but it doesn't make ultra pure H2O.

what are the current open problems in logic? in model theory, proof theory and philosophical logic? and what are the trends in research? what do researchers pay more attention to? p.s is there any book which gives an outline on the open problems in logic?

hi, a poll has been going on about our favourite fields in mathematics. i decided to run a poll on broader topics, namely, pure mathematics and applied mathematics. which one do you guys prefer?

say i want to work at an accelerator, smashing some atoms and whatnot - as an undergrad i'd like to do a math and physics double major, should i go with applied math or stick to pure mathematics? ...or just go to one of those beam schools?

Hi, When modelling something such as a capacitor using a method like Boundary Element Analysis (BEM) then this may lead you to a visual model i.e it shows you the charge across the plates or the density of the fringing field, rather than a method which uses a pure mathematics such as Gauss'...

I'm sure a lot of folk have had to make tough decisions when faced to decide what they want to do for the rest of their lives. It seems I have 2 years to decide what I want to do for a living. I've narrowed it down to either studying pure physics, or aerospace engineering. I love the idea of...

I have bought a stump remover for KNO3 and it has the numbers 13-0-44, which i have heard is pretty good. I was just wondering, how pure is it? and also if i could remove those impurities. I have tried making BP with it and it didn't do much. lots of excess sulfur and charcoal was left over, so...

hey guys, iam an engineering student taking a year off (after my first year) and i was trying to teach myself linear algebra and set theory from a mathematical point of view ( the way that linear is taught to engineers is frankly an insult to the subject) and i find that i keep...

What colour is fire if your burning whatever in a room that is pure O2. rather then in normal air at a campfire which has a lot of other chemicals; like nitrogen. and does it follow that one experiment where say hydrogen burns as only 1 frequency of the spectrum

This may be better suited for the nuclear engineering forum, so feel free to move it. In decay processes that involve beta decay (or positron decay), there are pure beta emitters and mixed beta/gamma emitters. What determines whether a specific nuclide is just a pure emitter as opposed to a mixed?

What is a pure state and a mixed state?

We all know that it is possible to do mathematics for no practical purposes at all such finding a proof in number theory or exotic geometrical mathematics. The goal is to find internal relationship within the framework. But consider a normal (social/culture) language such as English. Is it...

have anyone read "A Course on Pure Mathematics" by G. H. Hardy? is it a good book?

A simulation I'm running takes the density as an input when preparing the system and I'd prefer not to have to measure it experimentally so it would be really useful if this was tabulated somewhere. I was looking in the Handbook of Chemistry and Physics, but L-Proline has no entry in it's...

i am now studying pure maths in uni. is it possible for someone to tell me wht kind of jobs would pure maths lead to? i believe it would be some jobs tht requires analytical and theorectical skill. bt is tht any exact examples pleasE?

X_1=\frac{n_1}{n_1+n_2}\implies n_2=\frac{n_1-X_1n_1}{X_1} where n1 is the moles of solvent and n2 is the moles of solute. 22.98=X_1\left(23.76\right)\implies X_1=.9672 and 1000 g of water is equal to 55.49 mol (n1), so plugging this all in gives: n_2=1.88\text{mol} which would be...

Theoretical Physics in the end is simply a set of numbers (mass, impulse, energy etc.) related to another set through a series of mathematical operations. Has it ever been tried to just set all the physical quantities of elementary particles in an n-dimensional space where each dimension is the...

is anything in our beautiful univerese 'purely' random? David Suzuki states in 'The Sacred Balance' that because we cannot know with certanty the position of a particle we therefore have no hope in understanding the univerese as we do not understand the most elementary levels. Anyway, i...