Components Definition and 949 Threads

Hello any body can find my mistake ?! TO find the component of a vector in other coordinate we can use the transformation matrix : http://up98.org/upload/server1/01/z/ff96m5hl2uahgjw3u2un.jpg but why this does nt work for acceleration vector ? i mean why i can't derive the component of...

hello , I want to get the electric potential function with displacement V(x,y,z) as Ex= -8 -24xy Ey =-12x^2+40y Ez= zero when I perform intergration on Ex and Ey seperately then sum them , the answer is wrong , why ?? I mean when I do this and then perform partial derivatives again ...

Hello, I want to calculate the velocity components x, y and z based on a velocity value and two angles (yaw along the z-axis and pitch). I know how to calculate the x and y components in an 2D-environment: initial velocity x = initial velocity * cos(theta) initial velocity y = initial...

I'm currently reading "Introduction to tensors and Group Theory for Physicists". I'm stuck on a question posed on dual spaces. The author gives the trace as an example of a linear functional on the vector space M_n(ℝ) (n x n matrices with real entries) and then asks how one would find the...

Hello! SCR and Diode are Active or Passive Components? Please clarify the definition of Active and passive components. I have some confusion in it! Regards otoman

Homework Statement Find impedance and Io. draw phasor diagram for rlc circuit V = 120cos(2π525t) where R = 10Ω, C = 1μF, L = 100mH, Vo = 120V Homework Equations Z = √(R2 + (ωL-1/(ωC))^2) = √(10^2 + (2π * 525 Hz * 100 mH - 1/(2π * 525 Hz * 1 μF ))^2) = 28.525Ω Io = Vo/Z = 120 V /...

I asked a similar question about gravity, but I would just like to check the math of this first. In the first picture I have a circle of radius r, There is a point p on the circle, and I am first trying to show that the equation below gives the area of the circle: 2\int^{90}_{0} \frac{\pi...

Homework Statement Be the vectors a, b, c such as: | a | = | b | = | c | = 10.5 Angstron The angles between these vectors are: alpha = beta = gamma = 109.5 degree These vectors represent the lattice vectors of a crystal. Find out their components (a_1, a_2, a_3, b_1...

Hello guys, The diagonal components of a density matrix represent the probability to find a particle in the corresponding state of the matrix; so in a spin +/- 1/2 (+ for up, - for down) system it's the probability to find a particle in either spin +1/2 or spin -1/2 state. If the state of...

Homework Statement A person walks 20m [N20(degrees)E], then 120m [N50(degrees)W], then 150m[W], and finally 30m [S75(degrees)E]. Find the person's final displacement. Homework Equations Is my solution correct? The textbook answers are 230m[N23(degrees)W] What did I do incorrect...

I'm looking for magnet wire, think this is just fine copper wire that is varnished, and some wire that's suitable for winding to make a antennae. Would the wires inside a CAT5E cable do for the antennae and the wires from the windings in an electric drill do for the magnet wire? Thanks AL

Hello Experts! Here is my simple clap switch schematic. First let me know is it correct or not? I have used 555 timer in monostable mode here this means LED will remain on for the particular period of time defined by R3 and C1 i.e. T=1.1(R1)(C1). Let I use red LED here. So I think 1.7V is...

Hi, Is there any method(circuit) to retain only the positive frequency components of a signal? thanks in advance.

Clamp switch using 555 timer in monostable mode(Working of components) Hello experts! Here is my circuits in the attachments.(Monostable mode of 555) All values of components shown here have been chosen by myself and all are arbitrary. I want to ask some question about this circuits. i.e...

Hello guys, nice to meet you all. It's kinda awkward since I'm new here and also just a freshmen in my university :) Anyway, I'm conducting a study about the LED components, whom I've already known it is consist of aluminium and Gallium Arsenide (GaAs) or Gallium Phosphide (GaP) or Gallium...

I have been given a graph with 5 squares along the x-axis and 8 squares along the y-axis, with each square 10x10 cm. The graph shows the motion of a projectile entering the graph after accelerating down a curved ramp and up again. The graph is a stroboscopic photograph of the projectile...

Is E22.3 N the same as ( 22.3 east of north ) ? Is it This angle | / | / | / | / -----------------x or this one | | | | |_____------- this angle ----------------- the question is " A wind with a velocity of 40.3 KM/H blows [E22.3 N]. What is the north component of the velocity in Km/h? I...

Is there any website that already has 3-D models of steam generators, turbines, reactor vessels, cooling towers, or containment vessels? I am trying to develop some models so that I can rapid prototype scale model nuclear power plant components. The reactor will hold water and will be pumped...

I'm supposed to find the currents flowing through the circuit. While loop analysis is pretty easy, converting a bunch of complex numbers back and forth can get complicated fast. I'm not asking for the exact answer, but please look through the solution to verify if my working is correct. Many thanks.

Homework Statement A Gaussian surface in the shape of a cube has edge length 1.14 m. What are (a) the net flux through the surface and (b) the net charge (in C) enclosed by the surface if the electric field in the region is in the positive y direction and has a magnitude that is given by...

Homework Statement Revered Members, Kindly see my attachments. Homework Equations This is Atwood machine dealing with motion on a frictionless inclined plane. The Attempt at a Solution To better visualize the forces involved, i isolated m1 and m2 and drawn free body diagrams...

Homework Statement A hockey player shoots hockey puck towards net. The net is 20 metres infront of the player. If the puck leaves hockey stick at 30 m/s and 10° above ice. Find x and y components of the velocity. If the goalies catches puck just infront of net calculate final velocity of the...

What are the resultant components of the vectors? Homework Statement Determine the sum of the following three vectors. Give the resultant in terms of a. components, b. magnitude and angle with x-axis. Vector A has a magnitude of 66 at an angle of 28 degrees northeast (quadrant 1) Vector...

Homework Statement A lost dog travels 30 degrees south of west for 450m. He ten smells some food and sprints at 20 degrees east of north for 600m. a) draw each vector. Label magnitude and theta. b) calculate the vector components c) calculate the magnitude of the dog's displacement...

Homework Statement Amy wants to reach a destination that is 330m [E31 degrees N] from where she is. She travels a distance b towards [E20 degrees N] and then 100m to her destination. What is the distance b? (list all possible answers) (Sorry I don't know how to get symbols) Let [N] and [E] be...

Workmen are trying to free an SUV stuck in the mud. To extricate the vehicle, they use three horizontal ropes, producing the force vectors shown in the figure. (985N @ 31 Degrees Quad 1, 788 N 32 degrees Quad 2, and 411N 53 degrees quad 3. How do I find the direction of the resultant of...

Homework Statement The diagram below shows two vectors, A and B, and their angles relative to the coordinate axes as indicated. http://loncapa.physics.mun.ca/res/mun/PHYSICS/msuphysicslib/Graphics/Gtype07/prob01a_vectors2.gif DATA: α=43.7°; β=53.4°; |A|=4.30 cm. The vector A−B is...

A formula I know for the number of functionally independent components of the curvature tensor is: (n^2)(n^2 -1)/12. It gives 1 for n=2, 6 for n=2, 20 for n=4. However, for a metric space (with symmetric metric), the curvature tensor is completely specified by the metric tensor. For n=4...

I am trying to get fimilar with electrical components. I did some BG research on relays. Does this make sense. 1.My systems needs a switch to control a component so that is why I need a relay. It is a micro-switch that will move towards its position(Normally open or Normally Closed) depending...

Homework Statement I can't figure out how to start to find the components of these vectors! (see attached) It seems like there's not enough info :( What am I missing?! Homework Equations The Attempt at a Solution

Homework Statement You are given vectors A= 5.1 { i } - 7.0 { j } and vec B= - 3.8 { i } + 7.3{j}. A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of vec C with vec B is 16.0. Find the x -component and y-component of vector vec C Homework...

I always seem to find this place whenever I'm in need of homework help, so I finally decided to register (and hopefully post in the right area). My given problem is Here are three displacements, each in meters: d1 = 4.2i + 2.7j - 7.9k, d2 = -1.0i + 2.0j + 3.0k, and d3 = 4.0i + 3.0j +...

Homework Statement there are four particles A(0,0) B(10,10) C(0,15) D(0,5) with masses of MassA=5kg MassB=10kg MassC=20kg MassD=25kg Questions: a)total force acting on A. b)total force acting on C. Homework Equations F=Gm1m2/r^2 The Attempt at a Solution

Homework Statement Picture is attached Homework Equations The Attempt at a Solution I feel like I am right and the computer is wrong, but I just wanted to check here first. I attached a picture of the problem and my answer. This is how I solved the problem: Fz=750sin(45)=530.33N...

Homework Statement I have trouble understanding what the components are suppose we have this discrete time signal x[n] = e^{j \frac{2\pi}{3} n} find the number of harmonic components Homework Equations The Attempt at a Solution in my book it says that we have a set of harmonically...

Homework Statement Consider a boundary between two dielectric media with dielectric constants \epsilon1 and \epsilon2 respectively. The boundary carries a surface charge density \sigma. Use appropriate integral forms of Maxwell equations and an illustrative sketch to derive continuity...

Homework Statement please see the pictures! Homework Equations F=k(q1)(q2)/r^2 The Attempt at a Solution okay, I am just curious as to why t cos theta and mg are x components when they are clearly on the y axix! I thought you used cos for x components and sin for y components

Homework Statement #26 (on attachment). The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 17.0 m/s in a direction of 68 degrees NW. What is the magnitude of the ostrich's velocity component that is...

he question asks to find the ratio between E0 and B0 and the ratio between w and k ? E and B are on the x-y plane they are given as verctors without any components dividing no x direction part,y direction part,z direction part so when when i use the maxwell equations \nabla\times...

hello! please someone help me,:smile: here is my question. Find the components of d=(3,5,7) along the directions of u, v and w consider: u=1/3(2,2,-1) v=1/3(2,-1,2) w=1/3(-1,2,2) I don't know where to start, I need some ideas to solve this thanx:smile:

Hi- I'm trying to calculate the effect of a magnetic field on some spectral lines. I know that each energy level will split into 2J+1 sub levels (each denoted by Mj). I can calculate the energy level splitting and using the selection rules (dJ = 0, +/-1, dMj = 0, +/-1, dL = 0, +/-1), I...

Hi all, I was reading the http://en.wikipedia.org/wiki/Quantization_of_the_electromagnetic_field#Electromagnetic_field_and_vector_potential" and I am a little bit confused. In this equation defining the vector potential \mathbf{A}(\mathbf{r}, t) = \sum_\mathbf{k}\sum_{\mu=-1,1} \left(...

If we find the Poynting vector at a point along all possible directions possible, can the different components of the vectors cancel each other, to give a net Poynting vector along some direction? I was wondering about this because Poynting vector after all represents energy flow. So can...

Homework Statement ^--------------^ |..../ |.../ |.../ |.../ |.../ |.../ |/_____________> ignore the dots If my y component is 120m/s and my X component is 50m/s, how do I go about finding initial V?? Attempt: i know that the y component = sin(O)*V and the x= cos (O) *V...

Homework Statement The components of a circuit with a voltage source and 2 resistors ( series ) has the following values vs = 10V, R1 = 100 , R2 = 150. With i1 leaving the +ve vs and i2 leaving -ve vs ( i.e. i1 entering node A, i2 is entering in the opposite direction of i1 ) Find: a)...

Homework Statement Given the following stream function: ψ=C(sin(theta)/r) Find the radial and tangential velocity components. Homework Equations ? Don't know any The Attempt at a Solution Absolutely no idea how to even begin. Do I take the integral or something? Any help...

other components? Hello, Lets say I have a glass of water with sugar or salt. Is it possible to somehow turn the water into a vapor without inputing energy into the other materials in the mixture? A microwave affects only water molecules, but when you raise their temperature- then...

Homework Statement Express the components of Fμν in terms of E and B.Homework Equations I have find sonewhere the final 4*4 matrix solution but i don't know what are the steps i have to follow in order to obtain it. The Attempt at a Solution

Discern initial V w/o components!? Homework Statement Ok, ball traveled 188m (618 ft) before landing on the ground. Assume ground is flat, and ball Vi is from 45o, disregard air resistance, and Starting position is .9m above ground. Find Vi I KNOW )))) a= 9.8 m/s2...

Lets say we measure L_z and L^2 simultaneously and L^2 happens to be equal to (L_z)^2. This requires a zero value for the x and y components of angular momentum. Does this mean, in this special case, we know the values of L_x L_y L_z & L^2 simultaneously?