Components Definition and 949 Threads

Hi everyone, I am an industrial engineer who is on a internship. For the purposes of my work, I need to understand the major components and operations of electric generators; I am not looking for knowledge that would allow me to design and critique, but just seek sufficient knowledge that would...

Homework Statement Pictures of an optical mouse I took apart are attached. We had to find a circuit, take a picture, draw the circuit diagram and explain how it works. I'm not sure what a few of the components are. U3 is for the scroll wheel but what is it? U1 (the big IC) is the guts of...

using this formula E=13.6-(13.6/n^2) E = energy n= energy level. using that formula Bohr predicted the energy levels for each of the allowable orbits in the Hydrogen atom. now i would like to understand why 13.6 is used...

In Classical Mechanics, are the three components of Angular Momentum L: Lx, Ly, Lz independent to each other? It seems that there is an identity in Classical Mechanics (Sorry, I can hardly remember where I saw it): [Li, Lj] = εijk Lk. Note: [] is Poisson Bracket, εijk is...

Homework Statement For a rectangular wave guide the components of E were found to be Ex = A1 cos( k1 x) sin(k2 y) e-i (\omegat-\gammaz) Ey = A2 cos( k1 x) sin(k2 y) e-i (\omegat-\gammaz) Ez = 0 Show that in these equations A1 = -A2 k2 / k1 Homework Equations See part (a)...

For years I have mastered the art of simulation and testing, but I almost never seem to be able to find SPICE models for real devices. For example, the TI OPA548. It's a high-current power op-amp. I would love to run some simulations...but I can't find a model of it anywhere to use in...

I realize this is a "simple" mathematical exercise, in theory, but I'm having a lot of trouble finding some algorithmic way to do it. The problem is this: I want to expand the contravariant metric tensor components g^{\mu\nu} in terms of the covariant metric tensor g_{\mu\nu}. The first order...

Homework Statement A circuit contains two elements which are either L, R or C. The current in the circuit lags the source by 50 degrees when connected to a 120V, 60 Hz and i= 5.6A source. Homework Equations tan Φ = X/R X= wL R= V/I The Attempt at a Solution (The question does not...

Homework Statement A brief description of the current condition here; I'm in confusion. The question states that there are 2 unknown components in a circuit and we are to find it using the given data. The voltage, current and frequency are irrelevant for the time being. I'm more interested...

Homework Statement two forces of 40N and 50N act at an angle of 60 degrees. determine the resultant force and the equilbrant this is what i have so faar: resultant=F1 + F2 let F1 be along the x axis add x and y components: F1x=40N F1y= none since its along the x-axis...

Hello! I have a few questions about how the Affine connection works. I know the geodesic equation; \Gamma^{\lambda}_{\mu \nu} = \frac{\partial x^{\lambda}}{\partial \xi^{\alpha}} \frac{\partial^{2} \xi^{\alpha}}{\partial x^{\nu} \partial x^{\mu}} So, for example, if I had the...

I came across this question. We're looking for the conctd components of this set of circles: centered at (0,1) and with radius 1-1/n B ((0,1), 1-1/n) for n = 3, ...to infinity The radii are getting larger up to 1. I'm thinking the connectd comp. form an open set at infinity would it be...

Hey, my first post on here, just wanted to ask how to calculate the effect of a motor, and a switching current in the wires supplying the power on the surrounding electronics. The two motors will be supplied a PWM signal of 20Khz frequency, 5amp, 7v2 at 80% duty cycle. This is part of a...

Homework Statement Vector A= 5.00 m (See the attached image for the graphical representation) Vector B=17.0m Vector C=15.0 m Homework Equations Pythagorean Theorem, Basic trigonometry The Attempt at a Solution Finding the magnitude of the resultant vector is not...

I am having problems finding the irreducible components of the variety W=V(x^2-y^2, y^2-z^2) the 1st part gives x+y, x-y, the second y+z, y-z, but I am pretty sure they are connected!

Hi, I'm a total layperson, haven't taken a physics class since AP in high school. Trying to figure some stuff out for some writing I'm doing (poetry, bizarrely enough). So excuse if this question is super-simple or if the terms of the question are nonsensical somehow. "Degree of freedom" in...

A surveyor walks 120 meters from a beginning point at 0 degrees along the east boundary line. he then turns 90 degrees north for aprox. 260 meters. on the way back he then walks 325 meters west at 155 degrees. determine the magnitude and direction of the resultant vector using the head to tail...

Why does a square wave contain only odd harmonics of the fundamental? If the even harmonics are low, how low are they. What happens to the even harmonics.

Just need a bit of clarification, I am attempting to make a dynamo system but not totally sure where to start. What components would be required? It needs to be pretty small, similar size to that used in a wind-up torch, and it will be required to produce heat rather than light. Any help...

Homework Statement hey I am having trouble figuring this out. The question states that i am to find the second component of velocity? there is a plane wave incident on a surface at (0,0). Homework Equations the incident potential is \Psi^{I} (x,t)= A\, e^{-i\omega (t-...

Homework Statement The diagram attached shows a solid engineering component which consists of a solid cylinder of length L and radius r, together with a right circular cone with semi-vertical angle = 11 degrees. The total surface area of the component is 481. The component is to be...

http://htmlimg2.scribdassets.com/cjr8y68tsmk4nsw/images/3-f2357829f8/000.jpg it's the picture on the bottom P= 15 Q= 25 I was wondering if this problem can be done using components of the force, instead of using the parallelogram law or the triangle rule. I'm a little confused on...

I have two questions about components which are closely related. The first is about how 'real' the component of a force is. Take a force F in diagram 1. You can componentize it along two perpendicular axes. Now, F\sin{(a)} is a force directed along the vertical axis. If we now componentize...

Homework Statement We're trying to integrate a vector, E, with components, Ex = 6x^2y, Ey = 2x^3 + 2y and Ez = 0, from the origin to x = -0.4, y = 6.1, z = 0.0. Homework Equations integral E dot dr = V The Attempt at a Solution i don't know how

Homework Statement A meteor is moving at a speed of 20000mi/hr reltiave to the centre of the Earth when it is 350 mi from the surface of the earth. At that time, the meteor has a radial velocity component of 4000 mi/hr toward the center of the earth. How close does it come to the Earth's...

I've been doing a project with condenser microphones, and I came across a schematic (see attached). I was wondering what some of the components do. I know the 10uF cap across pins 1 and 8 are used to set the gain (just cap makes maximum gain) of the LM386. I was told the 470uF cap is used...

Homework Statement Explain the factors that determine the parallel and normal components of the elctric field near to the surface of a flat metal plate Homework Equations The Attempt at a Solution No idea what this question wants..? Is it something to do with the smoothness of...

Homework Statement Two vectors have equal magnitude of 14.8 m and the angles are theta 1 = 32 deg & theta 2 = 108 deg. Find a) their x component b)their y component of vector sum \vec{}r c) the magnitude of \vec{}r & d) the angle \vec{}r makes with the positive direction of the x axis...

Homework Statement Consider the following two basis sets (or triads) in {R}^3: \{\vec{e}_1, \vec{e}_2, \vec{e}_3\} := \{(1, 0, 0), (0,1, 0), (0, 0, 1)\} \{\widehat{\vec{e}_1}, \widehat{\vec{e}_2}, \widehat{\vec{e}_3}\} := \{(1, 0, 0), (1,1, 0), (1, 1, 1)\}. Let a covariant...

Homework Statement Suppose the astronaut has a weight on Earth of 190 lbs and is wearing a space suit that weighs an additional 180 lbs on Earth. What is the y-component of the force in Newtons on the astronaut and his space suit during a jump on the Moon? Show your calculation. Does the...

Homework Statement At time t, a comet has the position R = (t2-1)i + 2tj At t = 2, find the radial and circumferential components of velocity and acceleration Homework Equations Vr = V * Ur Vθ = V * Uθ ar = a * Ur aθ = a * Uθ Ur = cosθ i + sinθ j Uθ = -sinθ i + cosθ j...

Homework Statement A boulder of weight "w" rests on a hillside that rises at a constant angle "a" above the horizontal. The boulder's weight is a force on the boulder that has a direction vertically downward. In terms of "w" and "a", what is the component of the weight of the boulder in the...

5 fundamental circuit components or functions and what are some safety functions that are performed in most practical power circuits? thanks:)

1. Problem is pictured here. http://engineeringhomework.net/statics/hw1p14.html" I have already found the x and y components, but I don't know how to get the u and v as shown.

1. Problem is pictured here. http://engineeringhomework.net/statics/hw1p14.html" I have already found the x and y components, but I don't know how to get the u and v as shown.

Homework Statement I read how to solve a problem I am working on, and part of it deals with adding vector components. A is the vector, Ax is the x component, Ay the y component, and theta is the angle A makes from the y axis.Homework Equations The Attempt at a Solution The solution involves...

Firstly, apologies for the notation. The 4-momentum of a massive particle (rest mass m) is defined by p=mu where u is the 4-velocity. Thus in a frame S in which a particle has 3-velocity u the components of p are [p]=gamma*(mc,mu) How can we then identify the zeroth component of...

Problem: An engineering system consisting of n components is said to be a k-out-of-n system (k<= n)if and only if at least k of the n components function.Suppose all the components function independently of each other with a probability 1/2. Find the conditional probability that component 1 is...

Homework Statement Sketch the waveforms of the harmonic components in the output and the resultant output voltage Homework Equations Vo= 0.98sin(1600*pi*t) - 0.1cos(3200*pi*t) + 0.1 The Attempt at a Solution I know that the 0.1 will be a straight line The amplitude of the sin wave...

Homework Statement ac with R-C coponents. Determine the tensiondrop over a capacitor in a circuit with ac. Homework Equations The Attempt at a Solution In the solution they use components of the V in sin and cos for the V of the capacitor but should it not be squared and then the...

Homework Statement Consider the two-dimensional space given by ds^2 = e^y dx^2 + e^x dy^2 Calculate the covariant and contravariant components of the metric tensor for this spacetime. The Attempt at a Solution Are the covariant components just e^y and e^x with the...

1. Suppose that two electronic components in the guidance system for a missile operate independently and that each has a length of life governed by the exponential distribution with mean 1 (with measurements in hundreds of hours). (a) Find the probability density function for the average length...

Homework Statement I read that if the direction of velocity is perpendicular to the acceleration the magnitude doesn't change and if they are parallel the direction doesn't change and if they are neither both change but if we have v1=6i+8j ,|v1|=10 theta with positive x =53 v2 =10j...

I'm finding it hard to understand this, does anyone know where I can find worked examples of how to find the components of the christoffel symbols of a metric? Please don't give me one to try, I really need a worked example. Thanks :S

My application involves narrow-band notch filtering of primary red, blue, and green wavelengths simultaneously from a white-light source. Will this yield greyscale output, black, or white? What if the light source is a RGB display? I understand that this may be a naive question - but it's...

Homework Statement A skier leaves the ramp of a ski jump with a velocity of 10.9 m/s, 13.9° above the horizontal. The slope is inclined at 48.4°, and air resistance is negligible. Calculate the velocity components just before the landing. Enter the x-component (horizontal) first and then the...

Homework Statement The force F = (15x - 22y)N is applied at r = (4.0x + 7.0y) meters. What torque (about the origin) does this force produce? Homework Equations Torque = r * F * sin theta r = magnitude of radius, F = magnitude of F, theta = smallest angle between the directions of r and F...

Hi all, I am fresh mechanical design engineer. I have some questions regarding the electrical components and wiring issues in mechanical design: (1) For an electromechanical system, how serious will motor influence the electronic components and wiring in terms of creating electromagnetic...

no. of field equations and components or Riemann tensor?? Someone was trying to explain to me about curvature in space. From what I got from what they were saying doesn't make sense to me. I'm not sure I understand what the number of components, N, of R\alpha,\beta,\gamma,\delta when compared...

Quantum physics texts describe how it is impossible to measure S(z) and S(x) spin components of a single electron at the same time where z represents the z axis,etc. What would happen if you try to trick nature by using a correlated pair of electons, emitted from an ion, moving in opposite...