Components Definition and 911 Threads

Homework Statement I am a bit confused on when to break up static equilibrium problems into their linear components, vs just jumping straight into angular torque without breaking the linear forces into their respective components. For example: A uniform plank of mass 30kg and length 2.0m...

Hi, Whenever I check a problem to find electric intensity at a point, it shows electricity at that particular point is resolved into components. Might be my question is a dumb one. But seriously I wana know why does it resolved into components? What happens if we do not care about the...

Can the covariant components of a vector, v, be thought of as v multiplied by a matrix of linearly independent vectors that span the vector space, and the contravariant components of the same vector, v, the vector v multiplied by the *inverse* of that same matrix? thinking about it like that...

Can the covariant components of a vector, v, be thought of as v multiplied by a matrix of linearly independent vectors that span the vector space, and the contravariant components of the same vector, v, the vector v multiplied by the *inverse* of that same matrix? thinking about it like that...

Any know a way I could find out the Earth's field in the city I live in. I ask this because I have performed the charge to mass ratio experiment and my prof said it would be nice to compare the field i found for the Earth and the actual field recorded by some institute. I can find...

Hello everybody, I'm trying to do some kind of keyboard device which has like 12-15 digital inputs and outputs to a serial USB port. Because other similar circuits I've seen I know I need a microcontroller and some capacitors. The problem is, my device has to be very small and I can't put...

Homework Statement A circuit contains two elements, but it is not known if they are L, R or C. The current in this circuit when connected to a 1.20×101 V, 60.0 Hz source is 4.70 A and lags the voltage by 4.20×101 degrees. a) What are the two elements? (Answer A,B or C) CL CR LR Homework...

Homework Statement Base ball player makes perfect contact with a ball striking it at 45° angle above the horizontal at a point 1.3 m above the ground. His ball just makes it clear of the 3m wall 130m from home plate. What was the velocity at with he struck the ball. Homework Equations is...

Hi, I'm completely new to robotic engineering, recently I got assigned to create a robot chess. There are 2 options robotic arm or using weight/pressure sensor so I would like to know what are the components I will need for this assignment.

Homework Statement A straight wire, of current I, radius a is centred at (α,β). What are the x and y components of the magnetic field B inside one of the wires? Homework Equations ∮B.dl = μ I_enc ∫∫J.dS = I The Attempt at a Solution Any point (x,y) in the wire has a constant...

Homework Statement The lowest excited states of the Be atom correspond to a 2s2p configuration of optically active electrons. What 2s+1Lj components originate in this configuration? Assume that Hund's rules hold for the multiplet and deduce the ordering of the energy levels. Refer to a table...

Homework Statement Resolve the force F1 into components acting along u and v axes and determine the magnitudes of the components. Refer to first attachment for full problem with diagram. Homework Equations asinθ bcosθ The Attempt at a Solution Please refer to attachments for attempt...

Homework Statement Pin C joins members ABC and CDE Homework Equations Sum of moments at a point = 0 Sum of vertical forces = 0 Sum of horizontal forces = 0 Weight of triangle acts as a force at its centroid (1/3) its length according to this figure. The Attempt at a Solution...

I am having a hard time understanding how to parametrize the function y = sin(x) into component form (i,j).

I would like to make an electronic electroscopes based on following concept, but its design cannot determine whether the charges are positive or negative. Does anyone have any suggestions what kind of components I can add into this device to determine the charges? Thanks in advance for any...

I am trying to match little square patches in an image. You can imagine that these patches have been "vectorized" in that the values are reordered consistently into a 1D array. At first glance, it seems reasonable to simply do a Euclidean distance style comparison of two of these arrays to get a...

Hey, Imagine a frictionless inclined plane situation where the ramp goes up and to the right. If we put an object on it with any mass m, would it be fair to say that both of the components of the weight are negative? My reasoning is that the x component causes acceleration to the left and the...

Homework Statement A race boat is traveling at a constant speed v0 = 130 mph when it performs a turn with constant radius ρ to change its course by 90°. The turn is performed while losing speed uniformly in time so that the boat's speed at the end of the turn is vf = 116 mph. If the magnitude...

My question is in regard to non uniform motion with changing velocities, such as a skier moving along a curved ski-jump. I'm kind of confused about the various acceleration vocabulary. I know of centripital, linear, and total acceleration of an object that is changing speed and direction...

Sailboat problem-- components of acceleration 1. Homework Statement [/b] A sailboat is traveling east at 5.70 m/s. A sudden gust of wind gives the boat an acceleration a=(0.800 m/s2,33.0° north of east). What is the boat's speed 5.50 s later when the gust subsides? What is the boats new...

I'm looking at Munkres: Topology Problems 1.2.4(c), 1.2.4(e), and 1.2.5(a). Problem 1.2.4(c) asks, "If g\circ f is injective, what can you say about the injectivity of f and g?" Problem 1.2.4(e) asks, "If g\circ f is surjective, what can you say about the surjectivity of f and g?" I concluded...

I am making an n-body simulator, but I'm stuck. How can I find the components of the Force acting between two bodies such as the Earth and the Sun. I know it's- F * Cos(theta) and F * Sin(theta) but if I don't know the angle how can I find the components? I'm using the diagram on this...

Homework Statement A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are 4.00 m to the north, 2.00 m north east, and 1.00 m west of south. Starting at the the same initial point, an expert golfer could make the hole in what single...

Homework Statement What are the x- and y-components of the polar unit vectors \hat{r} and \hat{\theta} when a. \theta = 180° b. \theta = 45° c. \theta = 215° Homework Equations The Attempt at a Solution Please check if I'm correct, i'll just show my answer for a since the process is...

I am designing a Bale loading machine to load Small rectangular bales of 25kg. The machine will be driven by its wheels so no hydraulics and no power being drawn from the PTO. An example of one can be seen http://marongfarmmachinery.com/sales/view.php/16 I would like to put a clutch on the...

Homework Statement The Attempt at a Solution I wanted to make sure I use the right angle for vector B. Also just wanted to check my work.

Homework Statement The components of Vector A are given as follows Ax=+3.9 Ay=-4 The angle measured counterclockwise from the x-axis to vector A , in degrees, is closest to: Homework Equations arctan(y/x)= theta The Attempt at a Solution Hey guys, I got the answer doing...

In their article [Integrals in the theory of electron correlations, Annalen der Physik 7, 71] L.Onsager at el. write: By resolving the vector \vec{s} into its contravariant components in the oblique coordinate system formed by the vectors \vec{q} and \vec{Q} it is possible to reduce the region...

In general 4d space time, the Riemann tensor has 20 independent components. However, in a more symmetric metric, does the number of independent components reduce? Specifically, for the Schwartzchild metric, how many IC does the corresponding Riemann tensor have? (I think it is 4, but I...

Homework Statement The components of vector are given as follows Ax= +3.9 Ay= -4 The angle measured counterclockwise from the x-axis to vector , in degrees, is closest to: A,136 B.134 C.224 D.314 E.46 Homework Equations...

Bluetooth components selection? Any "already made" devices? Hi all, this is what I want to get done: a device1 reads data from sensor using a parallel port, then send it to a device2. Here is what I can think of about device1, it should be a very small 8bit smp MCU controlling a com device...

Hi, I don't think my textbook gives much information on vectors in 3 dimensions. The first chapter is on vectors, but only uses 2 and 1/2 pages to explain vectors in 3 dimensions. I have found a wealth of information on vectors in 2 dimensions (there are literally hundreds of detailed videos...

θHomework Statement Find the components N_{x} and N_{y} of vector N in the tilted cooridinate system. Homework Equations cosθ = adg/hyp and sinθ= opp/hyp The Attempt at a Solution The correct answer is supposed to be N_{x} = -Nsinθ and N_{y} = Ncosθ The error...

Hello i know how to derive the components of acceleration in other coordinates like spherical start here : http://up.iranblog.com/images/0mbwuclckbu51bxt8jfa.jpg and at last we have : http://up.iranblog.com/images/geotowiaxdya2s6ewxk.jpg also , i know that acceleration is a contravariant...

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

[FONT="Times New Roman"]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...

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...