Idea Definition and 811 Threads

i mean how to find conferences.?

[ p→>q] or [ (>q→r) and (>r→>p) ] thank you

How does salt analysis work? How did they divide cations into these 6 groups? I'm confused over things like:- In a group we precipitate metals through their sulphides - but only few of the metals precipitate - why only specific emtals precipitate. Then in another group we precipitate metals as...

So Polarization of light has always really bugged me. Linear polarization is simple. I understand Elliptical and Circular as well; the Electric Field vector changes as the Ex and Ey(or Ex and Ez, etc) functions grow and recede, periodically. This is easy to show as the propagation of a singular...

Does anyone else find it cosmically romantic the significance of binary stars? The fact that they orbit a common area, looping around each other is stuff that poems, are made of.. Anyway, I'm a hopeless romantic, but I love the idea, its just really beautiful if you think about it..Any how, does...

Hello physics forums! Looking for some informed input on this subject as many of you are involved in job searches (or maybe you do the hiring) or have been involved and have a better idea of what goes on out there in the real world then I do. Right now I have a junior Physics major, and my...

Hi all, I am a student from India doing masters in communication systems. I have an issue with implementing an idea in matlab. Please check if you can help with it. My course project deals with "Cooperative Spectrum Sensing using Cyclostationary Feature Detection in Cognitive Radio for...

My daughter is entering a science fair competition in 3 weeks. I'm helping her with her experiment. She is 10 years old, in 4'th grade and about average to slightly less interested in science. I'm trying to come up with an idea that meets the following criteria... I want it to be at a...

I think I'm pretty good at standard induction. Never had a problem. Induction and recursion is mercilessly whooping my ***. Homework Statement Let a1 = 1. For each natural number n > 1, let an = 3an-1 - 1. Prove that for each natural number n, an = 1/2(3n-1 + 1) Homework...

The technical definition of an adapted stochastic process can be found here https://en.wikipedia.org/wiki/Adapted_process. I understand the following chain of consequences from this definition: {X_i} is adapted \Rightarrow Each random variable X_i is measurable with respect to the...

"Invention" Idea - Cheap Room-Temperature Superconductors Now? I propose that if you encase a superconducting material along with liquid helium (or some other coolant) inside a Dewar flask or Thermos and then insert liquid helium, and then cool the superconductor+liquid helium once down to...

in q zeno effect, measuring, or observing a particle will effect its outcome. however, its been said on this forum that the hup is there whether we observe it or not. contradiction?

Hello! Long time peeker, first time poster. I recently made a GR joke/brainteaser on a pop sci blog I frequent, and the tirade of nutty reactions it provoked drove me to an agitated contemplation of the matter, which gave rise to a few ideas. I was thinking that maybe a Gallileo type...

I have an EE course that requires me to write a product development proposal and right now I am looking for ideas for new products. Are there any new products (EE focused) that you think should be developed or wished existed, but doesn't? Keep in mind that the budget is one million dollars so...

This will be my capstone project for my BS in Computer Engineering... I would like to design an Electric Motorcycle which has the ability to interface with an Android based tablet. The ECU would be most likely an Arduino or ARM based processor which would output information to an Android...

I have always been quite curious how physicists reconcile the concept free will with the determinism of physics. By determinism I mean the one at macroscopic level, because I know that at quantum level most of the things are based on probabilities. So there's no free will for an electron...

error on mathlab, and I have no idea how to correct it, please help me out :( Hello guys, I was using a class assignment using matlab, and the code is provided by the professor. All we need to do is use plug the function in and run it. But for some reason, I got this error: ? Error using ==>...

On the arbitrary idea of some String Theorists that some dimensions are "small". [Disclaimer: I'm not an expert; a genuine question on basic notion of the theory follows, pardon the excitement:] I don't get the arbitrary idea of some String Theorists that beyond the 3rd/4th dimensions the...

Hello! Im working on a design lab but need a little help on making it simple enough to use materials you would find in a standard physics classroom. Purpose: To develop a testable question that examines the relationship between 2 variables governed by the law of conversation of Energy...

Greetings friends, I have a new idea for desalinating water but I am not good at physics. My idea may sound stupid and if so I am sorry for that in advance but please could you have a look. I am attaching the image to this post which will try to explain the simple idea to generate pressure for...

Hi, Has anyone taken calc 2 at a CC in the summer? I'm thinking of doing it so I can get to calc 3 faster. I'm worried that it might be too fast and I won't be able to absorb the material which will prepare me for calc 3. If this is too vague, I'll elaborate ;). Thanks, S

Hey, I recently bought my gf a ring and would like to put it in a glass bottle and allow it to hang by a fish line with it corked on top. I haven't found any wine bottles that allow the ring to just go in naturally, I have been having to heat all of them. I was wondering if I were to...

I like to try and derive little things by myself if I think it is manageable. One such thing is the addition of velocities. I gave it a stab, got an answer, and it turned out to be wrong. So tell me where my logic messes up. There's a spaceship moving at velocity u1. A man in the spaceship...

Homework Statement I'm supposed to find all the eigenvalues for this 2x2 matrix: 0 2 3 0 Homework Equations The Attempt at a Solution When I tried to do it with no row interchanges, I got the characteristic characteristic equation: λ2-6=0 So, instead of solving this, I...

Is the following Idea well-known/usefull? The points of T not "surrounded" by A Let V be a metric space. Given a subset A\subseteqV we define a new set A\widehat{} to be equal to the set {x|for any open ball B1 with x \inB1 there exists B2 s.t. B2 \subseteq B1 and B2 \cap A = ∅}. Examples...

Sorry to ask all of you but i have i wild idea about the creation of the universe and I’m not shore where to send it... can you please give me an idea? I'm not actual a physicist but the idea sounds pretty good. Thanks

I have to write a ten page paper on a subject relating to things we have learned in University Physics 1. I'm having a really hard time coming up with something though. It's due Monday and I'm starting to get really stressed about this. Any ideas? (must be related to gravity, energy, and...

I'm going to give a presentation involving mathematical proofs to people who are not really into math (in a Critical Thinking class). I would like to use something from Euclid's elements. I would like it to be a geometric proof - but what is the most "audience friendly?" I need to be able...

Currently I am in my 3rd year of my B.E. in EE and I am really lost. What I learned from my school so far are, classes such as Linear System, Communication Theory, Digital Signal Processing, Microlectronics, Power, Control System, etc. I do learn about the basic theories and learn how to solve...

I am making a weapon of sorts and am curious if it will work. the project consists of two tubes, a smaller one inside a larger one. To the outer tube there is a slingshot attached, the inner one contains a projectile(arrow, spear, BB, rock). the inner tube is drawn outside of the outer tube...

Hi all ... Does anyone knows how to implement IDEA algorithm in VHDL, especially the multiplier part(Low High Algorithm)? Kindly help me out in this

Generally, there's two categories, for the people my age that I know of. 1) Clubbing and getting drunk senseless 2) Getting drunk senseless Hate everything about clubbing, including "dancing", which is just a somewhat polite way to say "hey, let's go be idiots and shake our tushies". (I...

(Complex number) I have no idea on this :( Homework Statement If z lies on circle |z|=2, then show that \left\lvert \frac{1}{z^4-4z^2+3} \right\rvert ≤ \frac{1}{3} Homework Equations The Attempt at a Solution Please somebody give me an idea...

Hey everyone, I want to make a a simplified "segway" project. I plan on using a servo motor with a wheel attached and attaching a breadboard to act as a inverted pendulum. My idea is to use LabVIEW to generate the PWM for the servo and (instead of using LabVIEW PID) use active filters to act...

I was wondering about the idea of representing real numbers as points on line , What is the basis of this assumptions , and as well the same question for Cartesian coordinates system ? All books I have read , express the idea of Cartesian Coordinates in an elementary way like spivak's , Apostol...

Do genetics and fossil record support the idea of genetic equidistance with respect to molecular clock, or is it mostly theoretical and inferred?

I am a 3rd-4th year student planning to try and get into graduate school in my field of study. But I got some terrible marks in my first year in courses relating to my program (science and math courses), and in a non-related course. Since some universities specifically require an undergraduate...

Hi, I know a little about a little and nothing about a lot, but I've got an idea and I thought this community may be able to lend a hand. Perhaps even find it interesting, who knows. I'm working on a race car, and I need to deal with pressure that can build in the crankcase because piston...

a magnet rotating a generator attracted to an iron bar, on reaching the iron bar triggers a switch which turns the iron bar to an electromagnet set to repel the magnet which inturn is attracted to the next iron bar and so on. Yes the electromagnet is charged by a battery but if the rotation is...

Homework Statement As per the attached picture, we are basically trying to find out the time interval between the instants that the particle (black dot) is in the first region of interest and the instant that it is in the second region of interest. i have a video in which the particle in...

Homework Statement x2y1+xyy1-6y2=0 find solution for this differential equation. y1 mean dy/dx How to do this question. I have no idea.

I understood the Delayed Eraser experiment, and the Eraser experiment and the basic double slit experiment. And all I can conclude is, why? Why is there such a necessity? I now understand that it's most probably impossible to learn the 2 properties at the same time but I don't see any...

So I had the greatest idea. You know the best way to stop kids from making baybays when they're not ready? Schools should have programs where teenagers have to look after babies for a few hours every day for a few weeks. Having a baby is such a traumatizing and evil event that some men even take...

One of the math classes I wasn't able to take in High School but wanted to take was Linear Algebra. Linear Algebra is has many uses like analyzing vectors or solving complicated systems of linear equations. Also for those students who want to go into pure math Linear Algebra can be a very good...

Homework Statement An alien civilization has crossed the galaxy to invade the Earth and enslave humanity, again. Their attacks have been successful so far because their assault troops are equipped with handheld weapons that project beams of charged particles (protons & electrons) at very...

I've had to take a handful of prerequisites for Math and it's caused my academic schedule to get jacked up - To keep a full-time load in each semester I will have to take Calc2(4 credits) and Engineering Physics 1(4 credits) during next summer (eight week session). It would be a Mon-Thursday...

Let T:P2\rightarrowP2 be given by T(x-1)=1-x T(x2-2x)=-1+x-2x2 T(3-x2)=-1+2x+3x2 Find the matrix for T with respect to the standard basis B={1,x,x2}for P2 To be honest, I have no idea where to start. Help would be greatly appreciated

Hello! Firstly, I'd like to say this is my first post, as I could not find a "new members" sub forum or anything of the sort. I'm a high school student (technically junior, but one year off) with a keen interest in the sciences, particularly in the fields of cosmology, particle physics, and...

This is not a pro creationism question. I can see where people are coming from with it but there is so much that it doesn't cover or explain but it is treated like the holy grail of "where the universe comes from" ideas/theories. I have nothing against Dr. Hawking by any means but something...

How awesome would it be if a competent physics professor clipped a high-quality mobile video camera on his shirt pocket, and recorded all the events in a few of his work days.. This kind of "vicarious video" experience will probably come down the line, as there are already these mobile camera...