Basics Definition and 371 Threads

I've just seen induced electric field concepts. Could anyone provide a link, which explains it? I had some rather stupid doubts regarding it: 1.If a circular conductor is placed in a varying magnetic field, then to find the induced electric field, we take the center of the conductor as...

I have a basic under standing of what it is but does anyone know in kid-friendly terms of how it is used, what it is and where it can be found? Thanks, Chase:smile:

Me want to know the exact basics. my example is If i bought option of 20$ with strike price of 25$ for 3 months at the date of expiry underlying [beep] et is having price of 33$ what are 1) intrinsic value and to whom it will go to holder of option or writer. 2) what is time value to whom it...

Homework Statement my apologies if this question should be posted in the math forum 3-d space spanned by orthonormal basis: (kets) |1>, |2>, |3>. Ket |a> = i|1> - 2|2> - i|3>. Ket |b> = i|1> + 2|3>. The question is to construct <a| and <b| in terms of the dual basis (kets 1,2,3)...

Homework Statement for what range of n is the function f(x) = x^n in Hilbert space, on the interval (0,1)? assume n is real. Homework Equations functions in Hilbert space are square integrable from -inf to inf The Attempt at a Solution I am having trouble with the language of the...

Hi All, this is not homework, just some basic revision for my own personal understanding, it's a long time since I went to school? I would like to refresh my mind on the following algebra please. 4ax + 2ay = 2a x 2x + 2a x y = 2a(2x + y) Sorry for not using the DOT...

In this PF Cosmo forum context we have to be sensitive/practical about language. How to state cosmo basics, especially to newcomers who may not have assimilated technical terms like "scalefactor" yet. This does not mean we dumb everything to the max! Introductory terms should lay a basis of...

How do I understand them and what they do? I've memorized "soh-cah-toa", but I still don't get what is the point of it. Like what is the application of finding something divided by another thing?

In his 1905 paper Einstein introduced two coordinate systems which he called K and k. It seems that both systems are inertial because there are no external forces and they are moving at the constant relative speed v. But I'm not certain, so are they both inertial? Is it correct that either one...

Does anyone know of a good place on the interenet that i can learn the basics of calculus? (I would prefer learning videos though i can do it without them if nessercery) Thanks in advance :wink:.

hi ,to all forums member from mahek.please help me out for understanding the basic concept of capicitor and homework it,s charge and discharging operation of it.

I need some help with some basic MATLAB questions. 1) When writing a MATLAB code, do I create a blank new M-file, and write it there? 2) I need the program to calculate values for an equation, as I vary two variable within the equation. I'm unsure how to do this (for example, how do I...

hi can anyone please explain to me what a Vane Actuator is? I need to know how the actauator functions, and what is its use. If anyone has any good links which I can use as resource, please also post the link. cheers

This is a very simple question... Because I'm not very good at these... notations... I feel like I need a clarification on what this means.. if X is a set, a basis for a topology on X is a collection B of subsets of X (called basis elements) satisfying the following properties. 1. For...

so if we want to find the force of a car with a mass of 1500 and going a constant velocity of 14m/s would it just be 0?? but if velocity is constant then A=0 so then force would equal zero too!? how can that be,because if it hits something it obviously exerts a force?? or would you just use the...

hi im learning MATLAB at home.So could someone tell me how to do the basic funtions add,subtract transpose,invert matix in the matlab.

I've being studying fluids and pressure, but want to clarify something. Take a rough example of a force applied on a fluid/gas is it correct to say that from 'P + pgh' one can say that as the volume and height increases or with these increasing layers there is more force been 'packed' behind...

Can someone explain to me what exactly these two constructs mean: struct integer { int* digits; int size; }; struct integer* read_integer(char* stringInt); I'm supposed to read in all the characters of a long integer (up to 200 digits) and return a pointer. How can I access...

Dear All, I have you aware that I'm new here,and currently a high school freshman. I'd actually like to learn some introductory materials needed to understand the basics of physics. Any recommendations? ~A GUY

Chemical bonds and quantum entanglement I have a very basic understanding of quantum mechanics and chemistry, so please bear with any misunderstandings I may have. My question is this: what does QM have to do with the bonding between atoms in a molecule or compound? Can these bonds be labelled...

OK so I am looking for a definitive answer. I am very confused and don't know why! Any help would be much appreciated, I will try and convey the source of my confusion below. Firstly what exactly is psi(x) which crops up everywhere? Does it mean the probability amplitude of measuring the...

Hello Maybe I am standing on a garden hose (great German adage, does it exist in english or are you confused what I am talking about?) Okay, to the topic: Just for one dimension. It is easier: We have m\ddot{x} = F(x(t)) Now my book tells me that if I expansion with the velocity I should...

Homework Statement Find the eigenvectors of the following matrix: \[ \left( \begin{array}{ccc} 1 & 1 \\ 4 & -2 \end{array} \right)\] Homework Equations N/A The Attempt at a Solution I already know how to find the solutions. They are {1 1} and {-1 4}. My question is this: could a...

I've been struggling with the quantum mechanics' concepts for two weeks. It's been very hard to find any good resource (articles, books, etc) which explains the concepts of the quantum world in detail and in such a way so everyone can understand it. However, here are some of my doubts...

boiling point?? What is a literature boiling point?? Is it the same thing as just normal boiling point? What does this temperature tell us in regards to distillation of alcohol? (alcohol properties)

Homework Statement Flip N fair coins. The distribution for different numbers of heads and tails should be peaked at N/2. When N is very large, the peak will be very high. Let x = N(head)-N/2, required to find an expression for this distribution near the peak, i.e. x<<N. Homework Equations...

Hello, I have a differential signal going into an instrumentation amplifier (AD620). I would like to employ galvanic isolation on the inputs of AD620. Would anyone be so kind and tell me how it shall be wired? I don't know much about signal isolation. Shall 1:1 or 1:1:1 transformer be used...

well, I've some questions abt basics of thermodynamics (1)what is the meaning of enthalpy(h) i know h=u+pv but i don't know what it means, i know what internal energy means but i don't know what's the difference between internal energy and enthalpy,what's the meaning of quantity (pv) what does...

I'm currently a high school student and I'm looking forward to doing the physics olympiad and physics bowl and perhaps becoming a physicist myself. One problem I have is whenever I attempt some problems I have no idea what to do because I haven't had enough physics exposure. What do I need to...

Ok so I just started this course and we have to so review from first year stuff but I am completely lost and have no idea how to do the questions. There are a bunch so could someone just run through one with me please? Commercial aqueous nitric acid has a density of 1.42g/mL and is 16.0mol/L...

Numbers are used to tell us about the quantity of something Using just numbers and logic how do we prove that say 2+2=4 we can't use objects here as then the following problem comes up: if we have say 3/2+1 and we take all numbers to be objects..the 3 objects divided by 2 objects is...

is it true that the radiation a colder body radiates through a vacuum will never hit a hotter body and have its radiation energy absorped? Is the radiation simply one way from the hot body to the colder body?

hi everyone, I have recently started studying abvout control engineering, but am not getting a grasp on the basic idea behind controls. All the textbooks say that the output should track the input ideally , but why is it so? i.e if i give a step input to a system, the response should ideally...

Hi, I'm trying to cover the basics of Cabibbo theory, yet the materials I've been presented with give a very jumbled description, and I'd just like to ask here to obtain some clarity... Is it fair to say that the Cabibbo angle is a means of quantifying the different coupling strengths...

Hi all, I've been dusting off the grey matter a bit, and have a question regarding an example I found used in both high school and university physics when broaching the topic of Special Relativity. I do tend to ramble, and so I'll point you to my blog post at...

Hey all, I'm currently self-studying some basic electricity and magnetism for my 2nd semester of EE next year which has a "Fundamentals of Electricity" course. Now I haven't done any electricity-related stuff since my senior year of HS and I am frankly a little bit weaker than I would like to...

Homework Statement A 13cm diameter CD has a mass of 25 g. What is the CD's moment of inertia for rotation about a perpendicular axis through its center? Homework Equations I = \int r^2 dm and possibly... Moment of inertia of cylinder or disk, about center = \frac{1}{2}MR^2 The...

Does anyone know of a site that will help me learn mathematics ?. Having trouble with Euclidean geometry and vectors. Need a good source to read up on it and some examples would be good too.

can you name any good book which can teach quantum mechanics from very root to the end

please tell me any site where i can study SQL basics. thnx

Homework Statement iam doing an assignment on renewable energy, specifically wind power. basically, i wish to know what are all and any principals, laws and theories that you can think of involved in this system. i just wish to know the names, i can do the research (no matter how difficult or...

I was just wondering if anyone had a decent website explaining some of the basic terminology of differential topology. Specifically, I'm having a bit of trouble understanding charts and atlases and how one defines a smooth manifold in an arbitrary setting (i.e., not necessarily embedded in R^n)

Hello, I've read and learned the fundamentals of SR and understand it to quite a nice extent. I'm talking about the time dilation's derivation using a light clock. I've understood the derivation's concepts, i.e. the proved principle of speed of light being 'c' in all frames of reference. So...

Homework Statement Object weighing 100 grams is on a surface which is inclined to an angle where the mass just overcame the coefficient of friction (which is unknown) and started sliding down. Angle was measured to be 21 degrees to the horizontal. What I want to know is would the mass...

We have been going over causal systems and I am still having trouble determining what defines a system to be causal. I was told that if the input is anything besides x(a*t) where a=1 then the system is non causal. I can kind of see this, but it is still a bit blurry for me. I also was...

hi please can anyone tel me how to control a motor connectd to an electronic chip connected to the computer uning serial port , using visual basics(iknow how to use VB )

I'm having trouble learning electronics because I don't know what to start with. For example in order to learn about capacitors I need to know what they're used for. I know they store charge but I don't know what this stored charge is used for. When I read up on them it tells me they're used for...

Can anyone suggest a textbook/paper or two that serves as a good intro/reference to reps of SU(5), SU(5) GUTs and embedding the SM? I am looking for something that is beginner-ish to medium technicality. A reference of some sort that summaries all basic results and properties. thanks in...

Homework Statement Trying to prove some of the basic laws in set theory, and would like any opinions on 1 of my proofs (eg hints on how can I improve it, is it even a valid proof). Thanks in advance. (A \subseteq B \wedge B \subseteq C) \rightarrow (A \subseteq C) Homework Equations...

hey i know the basics about complex numbers like: 5*i^7 = 5*i^3 = 5 * -i = -5i = (- pi/2, 5) but now : how would i represent : -> 1 ^ i = ? = ( ? , ? ) or would it involve another mathematical dimention and be more of a (? , ? , ?) ? //////////////////// and now, how can i...