Components Definition and 949 Threads

I have three questions left to do and its been very hard because I am out of state with the family and had forgotten to pack my physics book. I really need help on this, I can't find any examples from typing in parts of the question. If you could help me on how to solve this and the equations...

Homework Statement Consider wavefunction psi (subscript "nlm") describing the electron in the stationary state for the hydrogen atom with quantum numbers n,l,m and the third component L3 for the orbital angular momentum operator L. What is the expectation value of L3 and of L3^2 for the...

Three forces acting on an objetc are given by F1=(-2.00i + 2.00j)N, F2=(5.00i - 3.00j)N, F3=(-45.0i)N The object experiences an acceleration of magnitude 3.75 m/s2. a) What is the direction of the accceleration? b) What is the mass of the object? c) If the object is initially at rest, what is...

The problem states that a plane approaching a mountain peak at a speed of 50 m/s is located at a vertical distance of 100.0 m above the peak. I calculated the distance at which the plane should release the package so it lands on the peak (first question), but the second question ask what the...

Homework Statement To state the uses of Capacitors, Resistors and Diodes in Laptop computers, Midi sound systems and Ipods Homework Equations The Attempt at a Solution I've looked around on the internet and tried a good few books but I can't find the specific information. I've...

I am trying to plot the components of the strain EXX,EYY and EXY in a 2D framework in MATLAB. The tensor matrix i have is B[exx,exy;exy,eyy]with each component 32x32 array. The values of Eyy is zero does that mean that there is no strain in the y direction between the two entitie sthat I am...

Determine the x and y components. A 40 lb force vector that makes an angle of 120 degree counterclockwise from the -y direction. I did Ax= (40)(-cos120 degree) and Ay= (40)(sin120 degree) I got the right answer, I just want to make sure that this is the correct way of solving the problem.

I am having some trouble with this question. Determine the x and y components of the following two vectors in the xy plane. (A) A 25- m/s velocity vector that makes an angle of 40 degree counterclockwise from the -x direction. (B) A 40lb force vector that makes an angle of 120 degree...

Errror Quoted for Electrical Components. What is it? (Where do I post electrical engineering homework questions? I'm home. I'm working. OK, maybe I'm not really working.) Manufacturers quote a percent variation from nominal value for their parts. What does this percent error even mean...

Vector A has a magnitude of 17 (in some unspecified units) and makes an angle of 27° with the x axis, and a vector B has a length of 26 and makes an angle of 75° with the x axis. Find the components of the vector in the following. (a) C = A + B ( , ) (b) C = A - B ( , ) (c)...

Homework Statement which of the following pairs of quantities transform under rotations of the axes as the components of a two-dimensional vector? a) (x2, -x1) b) (x2,x1) c) ((x1)^2,(x2)^2) Homework Equations The Attempt at a Solution Dont know where to start. i'd appreciate...

Homework Statement x1,x2) are the components of a 2 dimensional vector r when referred to cartesian axes along the directions i,j. derive the relations x1'= cosΘ x1+sinΘ x2 x2'=-sinΘ x1+cosΘ x2 for the components (x1',x2') or r referred to new axes i',j' obtained by a rotation of the axes...

Homework Statement A car is driven east for a distance of 55 km, then north for 34 km, and then in a direction 30° east of north for 23 km. Draw the vector diagram and determine the total displacement of the car from its starting point. Homework Equations the answer = arc tan (ay/ax)...

Homework Statement "a" vector - "b" vector = 7m(i) + -3.5m(j) + -4.5m(k) A third vector "c" vector pops out of nowhere. Find the new unit-vector notation such that "a" vector - "b" vector + "c" vector = 0 ?m(i) + ?m(j) + ?m(k) Homework Equations a - b + c = 0 The Attempt at...

Homework Statement the displacement vector A has scalr omponents of Ax= 80.0 m and Ay= 60.0 m. the displacement vector B has a scalr component Bx= 60.0 m and a magnitude of B=75.0m. The displacement vecto C has a magnitude of C= 100.0 m and is directed at an angle of 36.9 degrees above the +...

I've been stuck on this problem for too long and need help. Please explain the answer if possible. F1 has a magnitude of 8.80 n and is directed at an angle of \alpha= 65.0 above the negative x-axis in the second quadrant. F2 has a magnitude of 6.40 N and is directed at an angle of \beta =...

A test car travels in a straight line along the axis. The graph in the figure shows the car's position as a function of time. (attached figure) Find the x component of instantaneous velocity at points A-G. Could someone please tell me how I'm supposed to go about this problem? I know C...

Homework Statement Two forces are acting on a mass. One of the forces is a 40.0 N force and the other force is 30.0 N at the angles shown below: The magnitude of the force is: a) 15.3 N b) 15.6 N <-- correct answer c) 46.6 N d) 69.0 N Homework Equations Pythagorean Therom...

Homework Statement Vector A = (2x-y)m and Vector B= (x+ay)m (a is alpha, m is meters) If |A+B|=5m, determine the possible values of a.Homework Equations The magnitude of A= sqrt 5 The Attempt at a Solution |A^2 + B^2|=5^2 |(2x-y)^2 + (x+ay)^2|= 5^2 |(2x-y)^2 + (x+ay)^2|= 25 I cannot figure...

Hi there, I've been given this task to recognize the different types of power poles and their electrical equipments. The images are in the following link. I have encircled the equipments and components that are needed to be NAMED. http://www.geocities.com/flabberguest_gabcraft/powerpoles.JPG...

Of Capacitors and Inductors which is passive or active ? And by what definition ?

Homework Statement The components of a vector V are often written (Vx, Vy, Vz). What is the z component of a vector which is the sum of the two vectors, V1 and V2, whose components are (2.61, 1.72, 0.00) and (3.84, -4.54, -1.90)? b) Calculate the length of this vector. Homework Equations The...

Hi! In a non-uniform circular motion if I have two components of a vector in cartesian coordinates then how to find the tangential and radial components of a vector. For example ; I have Vx and Vy as horizontal and vertical components of a vector V respectively. Vx and Vy can lie in all...

I'm studying for an exam and can't seem to get this last practice problem! I've tried many ways but still keep getting the wrong answer. The professor has already given us the correct answer to the problems, but I want to know HOW to do it for the exam! Thanks in advance :) A boat radioed a...

Hello, I perform FEA (finite element analysis) and write massive amounts of VBA code in Access in order to streamline heat exchanger designs and I have a Boss with no experience with Tensors and the ASME (American Society of Mechanical Engineers) Section VIII, Div. 2 requires one to calculate...

I'm ready to begin proof of concept experiments on the Mk IV Tesseract, following on the limited success of https://www.physicsforums.com/showthread.php?t=205845" What I need is a motor that - is reasonably compact (we're talking <2 centimeters) though weight is not a factor - can be...

Seen as i had difficulty understanding this little topic and with my AS level exam soon, i figured i should find somewhere to ask without having to wait while class, so here goes... I had some questions to do (but this isn't about homework!) i couldn't seem to be able to get the right answer...

Homework Statement The general equation of motion of a non-relativistic particle of mass m and charge q when it is placed in a region where there is a magnetic field B and an electric field E is m\bold{\ddot{r}} = q(\bold{E} + \bold{\dot{r}} \times \bold{B}) where r is the position of...

Hello all, I'm just trying to find a distributor that will sell high frequency piezoelectric ceramics in a small quantity. There are a ton of distributors, but they want purchases in bulk. I'm just a lowly stage actor who has an idea, and I want to figure out a way to test the relation...

This may not be a differential geometry question (and a posting of this in Linear & Abstract Algebra forum didnt help either) but Hodge dual is used in diff geom in a slightly different form. Hence posting here: If A is a p-vector, then the hodge dual, *A is a (n-p)-vector and is defined by...

hello forum, a tensor, say a 3X3, has nine components. Upon change of coordinate system, those 9 numbers change accordingly. If the change is a special rotation, then the nondiagonal elements vanish and only the diagonal ones remain. (diagonalization). That sounds all good, but then I...

Homework Statement Show using cartesian components that d/dt(a.b)=(da/dt).b+a.(da/dt) The Attempt at a Solution a= axi+ayj+azk b=bxi+byj+bzk a.b=axbx+ayby+azbz d/dt(a.b)= d/dt(axbx+ayby+azbz)

Homework Statement A 60 cm diameter wheel accelerates uniformly about its center from 120 rpm to 300 rpm in 5s. 1) Determine its angular acceleration. 2) Determine the radial component of the linear acceleration of a point on the edge of the wheel 2s after it has started accelerating...

Homework Statement Bob walks 200m south, walks 400m southwest, walks 200m in a direction 30 degrees east of north. Use either trig or components to find displacement that will return bob to his starting point by the most direct route. Homework Equations The Attempt at a Solution...

Homework Statement Man runs with velocity = 5m/s @ 25 degrees north of east for 10 minutes. How far to the north of his starting position does he end up? Homework Equations The Attempt at a Solution I know this has got to be the easiest problem to solve but I am not getting it...

If A is a p-vector and B is a (n-p)-vector, then the hodge dual, *A, is defined by: A\ \wedge\ B = (*A,B)E \ \ \forall B\in \Lambda ^{(n-p)} , where E=e_1 \wedge\ ... \ \wedge e_n I am having trouble in deriving the tensor components of the dual (n-p)-vector - *A. Specifically, I am...

Homework Statement Calculate the x- and y- components of the force C which member BC exerts on member ACD. The cables are wrapped securely around the two pulleys, which are fastened together. (Note the different diameters of the pulleys) Problem Homework Equations The sum of moment...

Different way to solve projectile motion components? Homework Statement solve projectile motion formulas for \Theta and v_0 all measurements are in m, t is seconds y_0=.005 x_0=0 the averages from my trials were: x=8.775 m t=1.3 s Homework Equations x=x_0+v_0*cos\Theta*t...

A wild horse starts from rest and runs in a straight line 29° north of west. After 27 s of running in this direction, the horse has a speed of 15 m/s. Find the magnitude of the horse's average acceleration. Assuming that north and east are the positive directions, find the component of the...

1. Homework Statement : Bob walks 360 m south, then jogs 490 m southwest, then walks 360 m in a direction 35 degrees east of north. Use either trigonometry or components to find the displacement that will return Bob to his starting point by the most direct route. Give your answer as a...

I want to understand this: In the case of a dropped object, the horizontal component of the velocity with which the object hits the ground is not the same thing as the horizontal velocity itself, am i right? The horizontal component of the velocity when the object hits the ground means the...

Homework Statement Bob walks 160 m south, then jogs 630 m southwest, then walks 160 m in a direction 32degrees east of north. a) Use either trigonometry or components to find the displacement that will return Bob to his starting point by the most direct route. Give your answer as a...

Homework Statement Particle B, with positive charge q_a, fixed in the yz-plane at (0,d_2,d_2). What is the net force F on particle A (positive) due to this charge? Express your answer (a vector) using k, q_0, q_3, d_2, x hat, y hat, and z hat. Include only the force caused by particle B...

I got this book here that mentions en passant that the connected components of a (topological) manifold are open in the manifold. That's not true in a general topological space, so why does Hausdorff + locally euclidean implies it? I don't see it.

Hey guys, I am stuck on this question. I was wondering if anyone can help me. I am going to attach a picture. Here is the question. The magnitude of the vertical force F is 82.5 N. If you resolve it into components Fab and Fac. What are the magnitudes of these components? (unit...

So I did an equilibrium experiment using pulleys and weights, where we set up different weights at different angles and had to get the right angle and weight to make the ring in the middle be centered. I am suppose to find the X and Y components of the forces. I am sort of confused on which...

Homework Statement I had lab and I don't quite understand why I did what we did. We used an analog and digital VOM and used it to record the ohms and volts of various electrical components. I was wondering why when using the analog that different devices read completely different ohm...

1. A grasshopper makes four jumps. THe siplacement vectors are (1) 27 cm, due west; (2) 23 cm, 35 degrees south of west; (3) 28 cm, 55 degrees south of east; and (4) 35 cm, 63 degrees north of east. Find the magnitude and direction of the resultant displacement. Express the direction with...

In a rectangular coordinate system, a positive point charge q = 9.00 nC is placed at the point x= 0.250 m, y = 0, and an identical point charge is placed at x= -0.250 m, y = 0. Find the x and y components and the magnitude and direction of the electric field at the following points. (a) Find...

How do I find the x-component and y component for vector B?