Difference Definition and 1000 Threads

Hello,I've been reading my calculus book,and I can't tell the difference between a Taylor Series and a Taylor Polynomial.Is there really any difference? Thanks in advance

As I understand it, the 2-point fnuction is for 1 particle incoming, 1 particle outgoing. The 4-point function is for 2 particles incoming, 2 particles outgoing. Is this correct? So an N-point function describes N/2 incoming particles and N/2 outgoing particles? Thanks!

Well I was just wondering that what exactly difference between Cosmology and Astronomy...?

An exercise in my text requires me to (in MATLAB) generate a numeric solution to a given second order differential equation in three different ways using a forwards, centered and backwards difference matrix. I got reasonable answers for \vec{u} that agreed with each other (approximately) for the...

Hi guys!, i want to know the advantages/disadvantages of using ohmic contact and schottky contact, because i will fabricate a photodiode (p-n junction) and lot of the articles say that ohmic contact is the best for this kind of device. But schottky contact rectify the signal which is more...

So I'm supposed to find the exact values of the sine, cosine, and tangent of an angle by using a sum or difference formula ( i.e. sin(x+y)=sin(x)cos(y)+cos(x)sin(y) ), but this is the angle I was given: ${-13\pi}/{12}$. How do I use a sum or difference formula to get the sin, cos, and tan of that?

1.Problem The problem is: calculate the horizontal distance the ball will travel if the same spring is aimed 25° from the horizontal. This is the second part. The first part was: a small steel ball bearing with a mass of 21 g is on a short compressed spring. When aimed vertically and suddenly...

Homework Statement The following are the number of sales which a sample of nine salespeople of industrial chemicals in California and a sample of six salespeople of industrial chemicals in Oregon made over a certain fixed period of time. California: 59, 68, 44, 71, 63, 46, 69, 54, 48 Oregon...

Homework Statement Can somebody explain what ems is for a person (me) who has only heard of voltage? http://imgur.com/Y1JQy7w Lets say the batteries volt is 10V. Is it always going to be 10? Is the batteries ems 10V? Homework EquationsThe Attempt at a Solution

I'm only a gcse student but I like to think ahead. I know I want to go into a career in physics but in the health sector. I have read into both the subjects and what the courses at different universities entail but I can't quite suss the difference. If anyone could explain I'd greatly appreciate it!

Hey all! I am in Calculus 2, and we are starting to get into series. This may seem like an odd question, but on quizzes I seem to have difficulty identifying the type of series in order to be able to properly work it, and I'd like to have this down before I get to the test. Does anybody have a...

So, I'm relearning some Algebra for my Calculus class and I wanted to ask what is the difference between an equation and a function? For example, y = 3x + 2 f(x) = 3x + 2 Both are technically equations right? Why not just write them one way or the other way? Thanks!

Let \mathbb{S}^n be a simplex in \mathbb{R}^{n+1}, so \mathbb{S}^{n}=\{x\in\mathbb{R}^{n+1}|\sum{}x_{i}=1\}. Let D be a difference measure on \mathbb{S}^{n} with D(x,x)=0 and x=y for D(x,y)=0. D is also smooth, so differentiable as much as we need. Let (R) be a convexity requirement for D...

Homework Statement Homework EquationsThe Attempt at a Solution 1. 2. i) Use mesh analysis to solve for circulating currents I1 and I2. ii) What is the current dissipated by resistor R1? iii) What is the potential difference across resistor R3? 3 i) . Loop ABEFA...

Hello everyone, I thought I understood these terms, but got confused lately . My understanding Congenital- Present at birth Familial: Occuring in family or its members Hereditary: Transmitted or capable of being transmitted genetically from parent to offspring My questions 1. Ok congenital...

Hello, I was wondering if anyone would be able to tell me the key differences between a betatron accelerator and a cyclotron accelerator. Thanks :)

Hi, PF! In the study of mass transfer involving chemical reactions, I have seen the use of two different non-dimensional parameters which apparently quantify the same ratio. These are the second Damköhler number and the Thiele modulus, which are defined as \textrm{Da}^{\textrm{II}} =...

Homework Statement Homework EquationsThe Attempt at a Solution I formed a right angle triangle between the arrow downwards,d, and perpendicular line x from arrow. As such, sin θ = x/d. x= d sinθ path difference: d sinθ/λ My answer is C, but answer is B. Where did cos θ come from?

How do we find out the potential difference between two equal and opposite charged (conducting) parallel plates mathematically? Let the charge on a plate be 'Q', Total area of a plate be 'A', the distance between the plates be 'd'. I need a direct mathematical solution please, I've come across...

Hello! (Wave) I have to show that the following difference quotients are approximations of $f'''(x)$. $$\frac{f(x+3h)-3f(x+2h)+3f(x+h)-f(x)}{h^3} \\ \frac{f(x+2h)-2f(x+h)+2f(x-h)-f(x-2h)}{2h^3}$$ Which approximation is more accurate? Justify your answer.I found the Taylor expansion of...

So I have two questions relating to potential difference 1.An electron with a velocity of 5.0x10^6 m/s injected into a parallel plate apparatus through a hole in the positive plate. it moves across the vacuum between the plates, colliding with negative plate at 1.0x10^6 m/s. what is the...

Homework Statement Homework EquationsThe Attempt at a Solution we know the electric field at A is 0, so the force is 0. V = work / charge = U / q = F⋅D / q the electric field at B is 4 times 3.6N/C = 14.4 N/C since E = F/q, F = Eq force, F = 14.4q at point b V = 14.4q⋅d/q the...

Homework Statement What is the potential difference across each resistor? I know that I'll have to incorporate the V=iR equation but I don't know where to start though... My first attempt was with these: R1=4 R2=8 R3=5 R4=6 R5=3 24-I1R1-I1R2-I3R3+I4R4+I5R5=0 but this lead me nowhere so I...

I'm trying to replicate the model presented in this [paper](http://www.sciencedirect.com/science/article/pii/S1359431103000474), which is basically to model heat and mass transfer along a one-dimensional duct. There are four characteristic equations for this problem : Momentum conservation...

What Is the difference between Cosmology and Astronomy..?

Hi, I am confused about the difference (if there is any?) between the movement of oxygen ions and oxygen vacancies inside the solid oxides. In some literature I find they are taking about the movement of negatively charged oxygen ions inside the metal oxides, while in some other cases it is...

Homework Statement Compute ##A^j~\text{for} ~~j=1,2,...,n## for the block diagonal matrix##A=\begin{bmatrix} J_2(1)& \\ &J_3(0) \end{bmatrix}##, And show that the difference equation ##x_{j+1}=Ax_{j}## has a solution satisfying ##|x_{j}|\rightarrow\infty~\text{as}~j\rightarrow\infty##...

Is a terminating decimal in a different category of number (in the way "real" or "natural" are categories) from a repeating decimal?

This is about a debate (argument??) I am having on another forum in which people are claiming heat can be transferred from greenhouse gases in a cooler atmosphere to a warmer surface (that allegedly warmed it). The so called back-radiation is presented as a positive feedback which warms the...

Hello, Heat transfer through finite temperature difference is known a irreversible process because heat cannot be transferred from cold to hot temperature without doing any additional work. But, how this transfer affect the efficiency of the system? How this heat transfer decrease the amount of...

Why potential at a point can only be obtained by supposing/assuming a positive test charge there? For example There was a question In figure two points A and B are located in a region of electric field.,The potential difference ##VB##-##VA## is 1-positive 2-Negative 3-zero 4-none of the...

Homework Statement In the figure C1 = 10.0 μF,C2 = 20.0 μF and C3 = 27.0 μF. If no capacitor can withstand a potential difference of more than 130 V without failure, what is (a) the magnitude of the maximum potential difference that can exist between points A and B and (b) the maximum energy...

Can someone explain on the level of Griffiths QM what the difference between those two parities since I'm quite confused here. Some sources use the terms interchangably, some don't. Could anyone provide good definitions for both terms? Spatial parity seems pretty obvious to me to be the...

Hi today I was watching a demonstration of using explosives in demolition and emergency rescue and they did one where they wrapped explosive cord around a steel I beam and cut it in half then said this was a shearing force which sounded right to me but then they took a concrete post similar...

Homework Statement What is the difference between the Centre of Pressure and Centroid Homework EquationsThe Attempt at a Solution My understanding is that the centre of pressure acts on a centroid. So, how come they can be on different positions for a submerged surface?

Homework Statement Find P-Q (P=11.5 kN, Q=12.5kN) Homework Equations x-component = cos(angle)*force y-component = sin(angle)*force Pythagorean Theorem (to find resultant magnitude): c2 = a2 + b2 arctan (y-component / x-component) : to find angle of resultant The Attempt at a Solution The...

Hi guys, I consider the qm-derivation of the electronic states of hydrogen. There are two different derivations (I consider only the coulomb-force): 1) the proton is very heavy, so one can neglect the movement 2) the proton moves a little bit, so one uses the relative mass ##\mu## The...

In bacteria there's a capsule but I'm not sure what it is/does.

I am simulating electrons inside a cylindrical well like the one shown on the first figure. My current work has been on solving the Schrodinger equation numerically for the above potential and then finding corrections to the solution such that it is consistent with Poissons equation. To do so...

What is the difference between scalars and one-dimensional vectors? I know that we represent the set of all two-dimensional vectors as ##\mathbb{R}^2##, so doesn't this mean that we would represent the set of all one-dimensional vectors as as just ##\mathbb{R}##? However, doesn't this also refer...

What is the difference between viscuous force and drag force? Are they the same?

Homework Statement :[/B] Determine whether there exists an integer x such that x^2 + 10 is a perfect square. Homework Equations :[/B] N/A The Attempt at a Solution :[/B] Assume x^2 + 10 = k^2 (a perfect square). Solve for x in terms of k: x = ±sqrt(k^2 - 10) Since k is an integer and k^2 -...

Hi, I have written some codes for the finite difference solution of diffusion equation (\frac{\partial c}{\partial t}= D {\nabla^2 c}, where c is the species concentration and D is the diffusion coefficient) as follows: DO k= 1, tsteps+1 DO i = 2, zsteps DO j = 2, rsteps...

Homework Statement I've attached a url with a picture of the problem setup and diagram https://instagram.com/p/7nYNXTscre/ Homework Equations I used the equation V = KΣiqi/ri to solve for potential at A and B The Attempt at a Solution For Va I used K((Q/d)+ (2Q/(d^2+d^2)^.5)) I just plugged...

It is my first time learning about power in circuits. From reading my electric circuits text, I understand that when current enters the positive terminal of a circuit, power is being "absorbed" and when it enters the negative, it is "supplied". The book doesn't really go in depth on what those...

The problems states: An inverted hemispherical bowl of radius R carries a uniform surface charge density σ. Find the potential difference between the north pole and the center. I was able to do the problem and got the correct answer the book gives, which is (Rσ/2ε0)(√2 - 1). My professor...

I am trying to solve the following eigenvalue differential equation numerically: ∇2ψ = Eψ , where the coordinate system is polar coordinates and the boundary condition is ψ(R,Φ)=0, where R is the radius of the disk i am working on. To solve it I am using a finite difference scheme, but there...

When I connected the positive terminal of the battery to one terminal of the bulb and the other terminal (of the bulb)to the ground the bulb did not glow, even when a potential difference exists?

Electricity travels from higher potential to lower potential then why don't we get an electric shock while holding aa high potential wire without touching the Earth ( we are also at lower potential)

In difference between column the second point says one talks about similarity and the other of size.I think there should be term"smaller "or "similar" (point is both should mention the same thing) please guide