Analysis Definition and 999 Threads

Homework Statement Find the: -Complex power delivered by source -Power factor of total load -Is the power factor leading, lagging, or in unity?[/B] Homework Equations KVL/KCL The Attempt at a Solution I want to solve this via mesh analysis to get currents. Mesh1: -10V + V1 + 0.75V1 = 0 V1 =...

Homework Statement Find power absorbed by resistor, capacitor and inductor. Find the total complex power absorbed by all the loads.[/B] Homework Equations KVL/KCL The Attempt at a Solution I want to solve this using Mesh analysis. There is a supermesh where the 5A source is, so I start it...

What is modal analysis and what are mode shapes. Plz explain along with a real life problem for better understanding

How can you use dimensional analysis to estimate the force between two plates, as a function of the area of the plates and their separation?

Hi everyone, I am a complete beginner when it comes to circuit analysis that involves anything more than a few resistors and capacitors. Currently, I am working on a project that requires the transmission and reception of IR signals to control a motor. I know the requirements for the motor I...

Homework Statement Find expressions for VL1, VL2, IC1, IC2 for each of the two intervals of a SEPIC converter under CCM operation. link: http://i.imgur.com/EY98QbC.png Homework EquationsThe Attempt at a Solution link: http://i.imgur.com/SskXRoC.jpg?1

The observation model will be ##z=H\theta+v##, where ##z## is column vector containing the results, ##H## is the observation matrix, ##\theta## is the parameter vector and ##v## is a vector containing random additive noise. b.) In this case ##z##=[1 1 0; 1 0 1; 0 1 1; 1 1 1]*[##m_1## ##m_2##...

Hello, I am taking a class in RA, where we're using Bartle/Sherbert. Since I have studied few chapters from it in the summer before, I decided to take a look at a more rigorous book, like baby rudin, but since many have advised against that book, I turned to Pugh's real mathematical analysis...

Homework Statement Find Vc(0) Homework Equations Nodal analysis The Attempt at a Solution

Hi Guys, The schematic What do you think the effect of changing the value of the output tube cathode capacitor from 50uf to 250uf would be? Also the original schematic showed 500K pots and other newer schematics show 1M pots. What do you think the effect of that change would be? Next...

I am using Abacus 6.13 for development of FEM for test setup on shear capacity of cold formed steel section. it has some complicated interactions with those interaction only solid section model gives answers.but with web openings on section it has convergence problems. i tried with different...

Homework Statement Determine the output voltage Vo(t) in terms of Vs Homework EquationsThe Attempt at a Solution If I were to use Nodal Analysis to solve this, would these be the proper nodal equations?\frac{V1}{-j1.6} + \frac{V1-Vs}{175} = 0 \frac{V_{I2}-Vo}{10k} + \frac{V_{I2}}{1k} = 0

Homework Statement Find Va(t) using Nodal Analysis: Homework Equations Zc = 1/(jwC) Zl = jw*L The Attempt at a Solution W = 250 Z36mH = j9 ohm Z80mH = j20 ohm Z0.25mF = -j16 ohm (is capacitor impedance always negative? It says so in my instructor's notes but I forgot why) 20cos(250t) ->...

Does anyone here have any analytical experience with dissolved gas, particularly CO2? When CO2 is dissolved in water there can be several reactions: What I would ideally like to do is dissolve CO2 into water and then by some means of analysis, see how much of each species there is in the...

First off I'm studying for an exam tomorrow, this isn't homework. Also, I've already written the proof and verified I've gotten the correct answer. I'm here to ask some questions about the solution that I am not completely confident I understand. Here's the problem: Prove that n2 + 3n2 is Θ(n3)...

Homework Statement [/B] 1. Convert from time to freq domain 2. Use mesh analysis to find I1, I2, I3 3. Find Ve and convert it to time domain Homework Equations KVL V=IR The Attempt at a Solution Are these mesh equations correct? 45cos(500t) -> 45V 80mH -> 40j 50mH -> 25j 25uF -> -80j 12.5uF...

Homework Statement Use Mesh analysis to find voltage of Node A and B Homework Equations V=IR KVL The Attempt at a Solution Are my mesh equations correct? Mesh1: -j30V + (-j50 + 10)I1 - 10I2 = 0 Mesh2: (10-j20)I2 - 10I1 - j50V - I3(-j20) = 0 Mesh3: (-j20+30+j10)I3 - (-j20)I2 = 0

Homework Statement Attempted Solution: For my two nodal equations, I got: 40j + 20 - 12Va*j + 2Vb *j +4Va - 4Vb = 0 and 2Vb - 2Va - 6Vb*j - 4Va*j-10-20j Are these right? How do I solve this system of equations?

Hi everybody, I'm working on an analysis model of flexible gear in ANSYS workbench. This model has 3 components: flexible gear(FG), wave generator(WG) and rigid gear(RG) Applied force have two case: WG makes FG deforming from circular shape to ellipse shape, the FG contacts and engages to RG...

There is a question I am not sure of how I should start/approach. Any help would be appreciated, thanks. Vc(0)=3V and ic(t)=e^-50t for t>0 and t=0. Find the value of R and voltage v(t) for t>0 and t=0

When preparing a fine powder for trace metal analysis, is ashing prior to digesting unnecessary? If not, or not necessarily, where could I learn more about important considerations to determine whether of not any preparation prior to digestion is required? The one instance I have come across...

I am stuck on a problem given in Stein and Shakarchi's Complex Analysis. (Chapter 3, Exercise 15b) Use the maximum modulus principle or Cauchy inequalities to solve the following: Let $f$ be a bounded holomorphic function on the open unit disc, and suppose that $f$ converges uniformly to $0$ in...

Hi, I've just had my first lab in physics and I'm having a bit of trouble understanding how to determine the significant figures of my final answers and transforming them in scientific notation. For example: Homework Statement [/B] I had to measure three sides of a parallelepiped with a...

Can someone help me with the procedures for Modal Analysis and Harmonic Analysis of Composites using ANSYS APDL?

Homework Statement Homework Equations Node Voltage Method V=IR The Attempt at a Solution KCL at Node 1: KCL at Node 2: i is the current moving towards "a" I've simplified the two equations down but the problem I run into is that normally I'm able to write a third equation to define i0...

Hello, I have been doing high school physics for about 3 years now and I am perfectly fine with it. However, Something tricked me off few days ago. It is how we treat units. I was kind of hesitant to post this thread because I have seen multiple threads about it before and some member really...

Homework Statement Determining the best resistance for my simple circuit consisting of a diode, battery, and resistor. Doing this using Load- Line Analysis Homework Equations ID = VD - V / R - Given by KVL[/B] (I can disregard n-pretend ) The Attempt at a Solution [/B] Here I have...

Hello, I am trying to analyze an injector and having trouble coming up with the final equation for the calculation. The apparatus can be seen below. Assuming we know the inlet flow rate and pressure (A) from the pump/fan and the pipe geometry. The pressure out of the outlet of the nozzle is...

I've been out of school for a while and working as a programmer. I want to start taking some masters courses for applied math (PDEs, numerical analysis, etc) and need to become familiar again with the advanced math I used to use in undergrad. I took two semesters of real analysis as an...

Homework Statement Homework Equations I know that potential from a point charge equals kq/r and that potential difference equals - (integral of)(E dot dl) The Attempt at a SolutionI tried to approach this problem using the point charge approach by comparing the relative values of kq/r for...

Homework Statement [/B] Find I by mesh and nodal analysis Homework EquationsThe Attempt at a Solution ##V_{10}## is defined at the junction of ##Z_1##, ##Z_2## and ##Z_4##. ##V_{20}## is defined at the junction of ##Z_2##, ##Z_3## and ##Z_5##. ##0V## is defined at the junction of ##V_1##...

Homework Statement Homework Equations I know that power of a lightbulb/resister is I^2 * R The Attempt at a Solution OK. Here's my attempt: Let's consider the situation where we do not close the lightbulb and assume that the wires and switch are ideal because they have no resistance. I...

Homework Statement Homework Equations Loob Analysis V=IR The Attempt at a Solution So I think I have the right equation here, but I am a bit confused on some parts. I am not too sure why i2=i1-ix. The way my professor explains it doesn't make much sense. Also (TYPO) in the second...

Sorry in advance if I've posted in the wrong section. given the set ##\{r_i, r_{ii}, r_{iii}, ... , r_R\}## where ##r \ \epsilon \ \mathbb{Z}_+ \ , \ r_i \geq r_{i+1}##How would you go about finding the bounds of something like this, or determining if it even has any? ##( \...

I am trying to understand space vectors in 3 phase machines. If you have a balanced 3 phase system, the 3 phasors of voltage, current or whatever... should sum to 0. i<0 + i<-120 + i<-240 = 0. But in this image of a rotating space vector ...

Svein submitted a new PF Insights post An Analysis of Road Capacity Continue reading the Original PF Insights Post.

Recently I started studying semiconductors and analogue electronics. First I studied the diode and its I-V characteristics and analysis in DC circuits, as well as in AC circuits. Now I started with BJT transistors. I was explained that transistors act as electronic switches. My problem is not...

Homework Statement Write the given numbers in the polar form ##re^{i\theta}##. ## \frac {2i} {(3e^{4+i})} ## Homework Equations ## z = re^(i\theta) ## ## \theta = Arg(z) ## ## r = |z| = \sqrt { x^2 + y^2 } ## The Attempt at a Solution I'm not really sure how to go about the exponential...

I know that there are several models of the real numbers, some where the Continuum Hypothesis holds, others where it does not. I would like to understand why the usual definition of the reals, limits of Cauchy sequences of rational numbers under the usual absolute value norm, isn't one of these...

How do we check consistency of measured data, e.g. x1 = 1 ± 0.1 x2 = 1.4 ± 0.3 I can do this for two different samples to check for significance in terms of different means, but how to check internal consistency of a single set. How can we do this using: a) standard normal probability table...

the first year of operation for a small company yielded a loss of \$5000. The company has \$15,000 per year tied up in fixed costs and spent 40,000 on raw materials and labour. Since the company was not well known, they were only able to sell 500 units of their product that year. It is hoped...

Hi guys! I have a B.Sc. in physics in Italy and I'm about to choose my Master of science. I realized, while working on My B.Sc., that I don't really want to work in a lab, so I'm looking for other possibilities other than the usual theoretical/condensed matter/medical physics. A University in...

So I decide to self-study the real analysis (measure theory, Banach space, etc.). Surprisingly, I found that Rudin-RCA is quite readable; it is less terse than his PMA. Although the required text for my introductory analysis course was PMA, I mostly studied from Hairer/Wanner's Analysis by Its...

Hello everyone, There is something that has been bugging me for a long time about the meaning of Lorentz Transformations when looked at in the context of tensor analysis. I will try to be as clear as possible while at the same time remaining faithful to the train of thought that brought me...

I've seen the terms tensor calculus and tensor analysis both being used - what is the difference?

Homework Statement ii)Rayleigh method gives me inverse of expected result.Would really appreciate your help. Homework Equations show that ##f(gamma)##=##(\frac {ro*R^5} {E*t^2})## where ro=density R=radius E=energy The Attempt at a Solution We will do dimensional analysis on the elements...

I am currently working through Spivak, and have finished Geometry by Moise. I wanted to learn numerical analysis on my own. I could take it at the university, but I rather use the elective for differential geometry. What are good books on Numerical Analysis? I have completed 2 books in Linear...

Homework Statement so, i had this question where i had a sphere and a cylinder with given dimensions and propreties ( roh, C and k) he also gave me initial temperatures, then both of them dipped in a bath of water of given temperature but unknown h ( convective coefficient) then he gave me the...

Hello! I am currently searching for some alternative books I can use for the analysis course starting on this Fall Semester. The course will cover the compactness, contraction principles, approximation theory, and some applications like special functions and Fourier series. The required...

Hi The relation between torque, moment of inertia and angular acceleration is: T=Ia Have a look to it's units: (N.m)=(kg.m^2).(Rad/s^2) >>>> N=kg.m.Rad/s^2 Please explain the equation Dimensionally. How (kg.m.Rad/s^2) is equal to N? Thanks.