Component Definition and 568 Threads

Honestly, I am soo confused...And this is the last problem left. If I get it wrong then I'm in trouble. Please help! I don't know what to do at all. A skier squats low and races down a(n) 11 degrees ski slope. During a 5 second interval, the skier accelerates at 2.3 m/s^2. (A) What is the...

Homework Statement A velocity of 10ms^{-1} is to be replaced by two components, 7.0ms^{-1} and 5.0ms^{-1}. What must be the angle between the two components? Homework Equations The Attempt at a Solution Now I think that the answer to the solution lies in using trig to work out...

Homework Statement Canon fired at 45Degrees, at 300m/s Assuming no air resistance, a= -9.8m/s^2 ViX = 300cos45 = 212m/s ViY = 300sin45 - 212m/s Displacement = 2293m [used vf^2=vi^2+2a(d)] rearranged for d, and vf=0, at highest peak. Time the ball is in the air= ? Homework...

Homework Statement A coastguard station locates a ship at range 15.4 km and bearing 123° clockwise from north. From the same station a plane is at horizontal range 19.4 km, 150° clockwise from north, with elevation 2.06 km. What is the vector displacement from plane to ship, let i represent...

I know that a vector has magnitude and direction. But what about its components? Are they still considered vectors? Thanks in advance

Homework Statement You are given a vector in the xy plane that has a magnitude of 85.0 units and a y component of -50.0 units.? The two possibilities for its x component are + and - 68.74. Assuming the x component is known to be positive, specify the vector which, if you add it to the...

How when do you know when to use cosα in the x component or y component? I thought you only use cosα on the x component since it's the x coordinate on the unit circle. Can somebody give me an example, I would appreciate it.

Homework Statement Find the Fx' and Fy components of the given force, given that y' is 10 degrees, there is a 60 degree angle between F and X in the negative direction, and F = 360 N. Use only the Law of Sines, Law of Cosines and Law of Parallelograms. Homework Equations Sin a / A =...

Use the component method to find the resultant(direction and magnitude) of the three forces shown. Could someone please verify my answers or tell me where I went wrong. Ax = 500 Cos 30 = -433N Ay = 500 Sin 30 = -250N Bx=-250 N By= 0 Cx=200 Cos 20 = 187.9N Cy= 200...

Homework Statement The vector -5.2 A has a magnitude of 47 m and points in the positive x direction What is the x component of vector A? What is the magnitude of vector A? Homework Equations The Attempt at a Solution

What does A1mean? This A1 component does not even have a X subscript. Then there's A1x and resultant R2.Can anyone give an example on how to interpret and graph both vector components & resultant from a problem? Thanks in advance.

Homework Statement Resolve the vector 6i+2j-2k into two vectors, one parallel and another perpendicular to i+j+k Homework Equations a\cdot b = 0 \; \text{for two perpendicular vectors} a=\lambda \;b\;\text{for parallel vectors} , \lambda = \text{parameter} The Attempt at a...

Hi, I'm not sure this falls under the homework category, but I posted this here because I think this is more of an insight question than a question for help on how to solve the excercise (which I have). I am reading Sadiku's Elements of Electromagnetism. There is an exercise reads something...

Apparently the nano laser is a key component necessary for practical application of optical computers. "Conventional lasers are limited in how small they can be made because this feedback component for photons, called an optical resonator, must be at least half the size of the wavelength of...

Homework Statement This isn't really regarding any specific question, I am just wondering how do I find the normal component of a vector valued function along a surface S? Stoke's theorem says the integral over a curve of F (dot) dx is equal to the integral of curlF (dot) n dA over the...

Hello everybody! Any of you have read the paper "EM algorithms for PCA and SPCA" of Sam Roweis? If so, maybe you could help me! :-) I have some problems with equation 2b, well, in fact my problem is that I don't manage to deduce it. If you didn't read the paper but are curious, how could you...

For the following, I was wondering if someone could help me determine the imaginary part of the complex number: Im<GVV* - j\omega CVV*>, where V* is the complex conjugate of V. I was thinking the imaginary component would be -\omega CVV*. But I am reluctant on the conclusion, because I am not...

Once again I'm going through all my old homework and taking the notes I should have done in the past, and I am stuck on calculating the components on a Bandpass filter. How would I go about this. I have the answers I just want to know how to find them. Thanks...

I am trying to simulate a square object affected by a force in two dimensions. I can break up the force vector into a vector whose extension intersects the center of gravity for translation and a vector perpendicular to that for rotation. My question is: how does this rotational vector relate...

By the Kronecker product I mean the ordinary tensor product of matrices. In my case I am only interested in square matrices, in fact I want to compute the nonzero elements of products like XXZZXXZZ where X and Z are 2x2 matrices (in fact they are the pauli matrices e.g. the standard...

The standard model of accelerating expansion is successful in matching parameters to observation, but substantial observational problems with both CDM and MOND are now well reported in the literature. While there is no true reconciliation between general relativity and quantum mechanics, science...

Hello, I'm a recent college graduate and I am applying to grad school. In order to be permanently accepted into grad school I must have a physics class with lab. While the school does offer a physics course with lab, the university is located an hour and fifteen from the grad school and I don't...

First-time poster here. Homework Statement A little cat, Bella, walks in a straight line, which we shall call the x axis, with the positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a...

Hey, i want to know the name and function of this component (in attachments)? thanks in advance...

Homework Statement What is the y component of the magnetic field at point O at time 0.227*E-16 s? Given: Frequency: 2.20*E16 Hz Max value of B-field: 4.00*E-8T when t = 0 at point O Homework Equations I think the following two equations could potentially be applied to the problem: B =...

Homework Statement http://img3.imageshack.us/img3/5681/32832.jpg All seven forces have a magnitude |F| = 32 N. w = 10 m, h = 16 m, and d = 15 m. Calculate the z component of the torque relative to position A. Homework Equations T = r*F The Attempt at a Solution Not sure how to...

Hi I am solving a problem at work right now and in order to do so I had to dust off my old physics book. But I've come across something which once made sense but I don't understand it now. If you have a force, say 100lbs, acting at an angle, say 45 degrees, and break it up into its components...

Homework Statement A 66-cm-diameter wheel accelerates uniformly about its center from 120 rpm to 260 rpm rpm in 4.9 s. Homework Equations a_t = r\alpha a_c= r\omega^2 a= a_r+a_t The Attempt at a Solution I have discovered that: \alpha = 3.0 \frac{rad}{s^2} and a_t =...

Let A = (4.6 m, 20^{}o south of east) How do I write this in compnent form? I know if it were (4.6m, North) is would simply be (0,4.6), but otherwise, how would I calculate this?

What is the simplest way to find out if a physical quantity is the component of a four vector? There are opinions that the Lorentz contracted length is not, the Lorentz dilate length being.

Homework Statement An arrow is shot into the air at an angle of 59.4degrees above the horizontal with a speed of 20.9 m/s. (a) What are the x and y components of the velocity of the arrow 3 s after it leaves the bowstring? Homework Equations v(o)sin(theta)t+1/2(a)(t^2) The...

When a force falls on a body, it gets a normal reaction. Conventionally this normal reaction can be given by friction, spring compression, chemical reaction, motion etc... Now...have we ever made such an arrangement that this normal reaction is derived from the stress on a body...nothing...

Homework Statement Attached is the pic of the problem. Homework Equations The Attempt at a Solution I used the inverse of tangent(Ay/Ax) and got 14.2 . I have a funny feeling I am not even close?

A force F of 6 units acts in the direction 30 degrees west of north. An object is constrained to move north-westerly, that is, 45 degrees west of north. (a) Sketch the force vector roughly to scale on a set of axes that has the positive y axis pointing north, and write F using exact values...

Hey guys, I current picked up Fundamentals of Aerodynamics by John D. Anderson Jr. and am having a little bit of trouble understanding some of the equations i am given. This is the first aero book I've picked up so I am not too familiar with aero concepts or terms yet. On page 20...

I'm doing a question on a 3D isotropic harmonic oscillator. At one point I need to find write the radial component of del^2. Lecturer has written \frac{1}{r^{2}} \frac{d}{dr} \left( r^{2} \frac{d}{dr} \right) where the del^2 used to be in the set of equations...

http://img367.imageshack.us/img367/5459/69671206ju9.th.jpg See image above. Point charges A, of +2.0nC, and B, of –3.0 nC, are 200mm apart in a vacuum, as shown by the figure. The point P is 120mm from A and 160mm from B. (i) Calculate the component of the electric field at P in the...

I'm doing a question on a 3D isotropic harmonic oscillator. At one point I need to find write the radial component of del^2. The lecturer has written 1/r^2 * d/dr * (r^2 * d/dr) I don't understand cause it looks like he hasn't actually changed anything, r^2 over r^2 ?

Homework Statement Prove that the number of electrons whose velocity's x-component is between [x,x+dx] is given by dN = \frac{4\pi V m^2 k_B T}{h^3} ln [exp(\frac{E_F -mv_x^2/2}{k_B T})+1]dv_x Homework Equations The Fermi-Dirac Distribution function: \frac{dn}{dE}=\frac{4\pi V...

A skier is moving at 85 km/hr straight down a tall mountain having a slope of 60 degrees. At what rate is the magnitude of the vertical component of his trip decreasing? I just don't understand exactly how to find it. The wording doesn't make sense to me and I don't know where to start.

Homework Statement A ship leaving its port sails due north for 30 miles and then 50 miles in a direction of 60 degrees east of north. At the end of this displacement, where is the ship relative to its port? An army recruit on a training excercise is instructed to walk on a bearing of 6.3...

I have 2 questions, here is the first: Homework Statement A 1.31kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.402m, and the string can support a mass of 34.6kg before breaking. The acceleration of gravity is 9.8ms^2. What...

...of the four-momentum vector. Why is the energy of a particle identified with p0 instead of p0? Is there a theoretical basis for this, or was it simply observed that p0 is conserved in a larger set of circumstances?

A rocket is fired at an angle from the top of a tower of height 50.0m. Because of the designs of its engines, its position coordinates are of the form x(t)=A+Bt^2 and y(t)=C+Dt^3, where A, B, C, and D are constants. The acceleration of the rocket after 1.00s after firing is a=...

Vplane = 63km/hr at x degrees and direction Vwind = 47km/hr at 211 degrees Vg = unknown speed at 165 degrees find the unknowns my attempt using component method: (Cos 165)Vg = (Cos 211)47 + (Cos theta)63 (Sin 165)Vg = (Sin 211)47 + (Sin theta)63 from here i think I am supposed...

Hey Hello, I am dealing with som Principal Component Analysis Can anyone explain why the first eigenvector of a covariance matrix gives the direction of maximum variability. why this special property of eigenvectors

Hai! Can anybody answer to me why the horizontal component of a projectile motion has no net force?Why is it move with constant velocity ? I know that motion doesn't need force but acceleration need force. But at the time a projectile motion started it motion ,why can it doesn't required...

So many places I've seen components (fancoils and such) with inlets that are let's say 1", but where the pipe leading up it is maybe 1 1/2". Does that make any sense at all? Can pressure drop have something to do with it?

An 18-g rifle bullet traveling 200 m/s buries itself in a 3.6-kg pendulum hanging on a 2.8-m-long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement. What I tried was find the momentum of the bullet, then find the...

This is definition of resistor from Wikipedia. 1. " A resistor is a two-terminal electronic component that opposes an electric current by producing a voltage drop between its terminals in proportion to the current" And this is another mention about Ohm's Law from a diagram of Wikipedia...