Components Definition and 911 Threads

O type blood Blood that is donated isn't necessarily compatible even if it's O type right because of the rhesus factor? Somebody told me it was but I think maybe they were wrong?

My crude understanding of GR in outline is that spacetime curvature is described by the way the components of the Riemann tensor vary from point to point in spacetime, that such variation is controlled by Einstein's field equations, and that the source of curvature is the energy-momentum tensor...

\PsiHow to intepret the four components of the dirac spinor? the volume integral of the \Psi^T*\Psi give the probability of finding the releativistic electron in a given volume of space but what exactly do the four components really mean. I have read in many Pop physics books that the 4...

Homework Statement Calculate the components of the vector representing a velocity of 40m/s and an 55 degree angle. Homework Equations none The Attempt at a Solution 180-55=125 40(sin125)=33 40(cos125)=-23 (-23,33)m/sec correct?

Homework Statement I read in my textbook that "in the instantanuous reference frame (IRF) [u^{'\gamma}]=(c,\overline{0}) imply that the components of the 4-acceleration in the IRF are [a^{'\gamma}]=(0,\overline{a'}) " Homework Equations The Attempt at a Solution I don't know why they...

A hammer slides down a roof that makes a 32.0 degree angle with the horizontal. a.) What are the magnitudes of the components of the hammer's velocity at the edge of the roof if it is moving at a speed of 6.25 meters per second? b.) Calculate the components of the hammer's velocity at...

Homework Statement In a crash test a car with a mass of 1273kg collides with a wall. The x components of the initial and final speeds of the car are 22 m/s and 2.2 m/s. If the crash lasts for .16s what is the magnitude of impulse? Homework Equations p=ms impulse= change in momentum...

The easterly and northerly components of a car’s velocity are 24 m/s and 30 m/s, respectively. In what direction and with what speed is the car moving? In other words, what is car’s velocity. Hint: this question requires input from Trigonometry for the right angle triangle. Thus, the car...

Homework Statement This problem is actually a worked out solution BUT i don't see where certain things come from...namely how the forces are split into their components. If you look at the attachment, you can see the weight is split into components mgsin and mgcos...I just do not see how...

Homework Statement a box weighing 388.5 N on an inclined plane that makes a 36.1 degree angle with the horizontal. compute the component of the gravatational force on the inclined plane in N Homework Equations The Attempt at a Solution would you find the gravatiational...

Homework Statement I have a vector A and B in spherical coordinates, and I need to find: part a) The vector component of B in the direction of A. part b) The vector component of B perpendicular to A Homework Equations dot product cross product The Attempt at a Solution...

What is the mean of bilateral and non-bilateral components in the electrical circuit?

I'm having a lot of trouble solving force problems even though I understand the concepts (or, at least I think I do). This is a specific example: A sphere of mass 3.0 x E-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 34 degrees...

A ball is thrown toward a cliff of height h with a speed of 30m/s and an angle of 60 degrees above horizontal. It lands on the edge of the cliff 4.0s later. How high is the cliff? do you just use the equation h=.5gt^2 ? and put it in -9.80=g and 4=t ?

A 135 grams baseball, moving along the x-axis with speed 30.0 m/s, strikes a fence at a 45 degree angle and rebounds along the y-axis with unchanged speed. Give the y and y components of its change in momentum --> ∆Px and ∆Py are the following correct? M= 0.135 kg Vx = 30.0 m/s θ=45...

Homework Statement A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0, and the man pulls upward with a force of magnitude 381N whose direction makes an angle of 30.0 with the ramp. Im in need of some help I can't seem to figure out how to...

Tension Problem x and y components?? Homework Statement A man of mass 70.0 kg hangs by 2 cables A and B each inclined at 60.0 degrees to the horizontal. A horizontal pulling force F is applied to the man pulling to the right. The man remains stationary. If F has magnitude 250 N, find the...

Homework Statement A 12.0-kg box resting on a horizontal, frictionless surface is attached to a 5.00- kgweight by a thin, light wire that passes over a frictionless pulley. The pulley has the shape of a uniform solid disk of mass 2.50 kg and diameter 0.440m . What are the x and y...

Two forces, F1 = (-6i - 4j)N and F2 = (-3i, 7j)N, act on a particle of mass 2 kg that is initially at rest at coordinates (-2.00m, +4.00m). (a) what are the components of the particle's velocity at t = 10s F1 = (-6i-4j)N F2 = (-3i + 7j)N Ff = F1 + F2 Ff = (-9i 3j) F = ma...

A golf ball leaves an 8 iron at an angle of 35.0 degrees at a velocity of 86.4 m/s. Determine the horizontal [x] and vertical [y] components of the velocity. There really were no equations for this, I attempted to use my protractor and ruler for this problem and ended up with a triangle...

Homework Statement Hey, I'm not sure how to continue... Forces of 10N north, 20N eat and 5N south act on an object of mass 4kg. How big is its acceleration and what angle does it make with the force in the eat direction. Homework Equations F=ma The Attempt at a Solution I drew and...

Homework Statement A http://www.maniacworld.com/squirrel-obstacle-course.html has x- and y-coordinates ( 1.2 m, 3.9 m) at time t1=0 and coordinates ( 5.5 m, -0.60 m) at time t2 = 3.1 s. For this time interval, find the x & y component of the average velocity. Express your answer using...

If anyone could explain to me how to do the problem below that would be great. I don't understand how the vector \vec{F} can be split into components when it's facing straight down? http://tunerspec.ca/school/question6.jpg

I am having trouble understanding when to use sine and cosine to find x and y components. I know that its not always going to be the same (ex. you won't always use cosine to find x component.) Any input would be appreciated!

Homework Statement Consider a closed circuit containing a cell and nothing else. If we assume that the wire contributes no resistance, and there is no internal resistance in the cell. Would there be current flowing in the wire? It's like if you're putting an ammeter in the middle of the...

^^ ^^ 1.) Given the two vectors b=x+y and c=x+z find b+c, 5b+2c 2.) r+s = (r1+s1, r2+s2, r3+s3), if r and s are vectors with components, r=(r1,r2,r3) and s=(s1,s2,s3) 3.) Is this correct for b+c? b+c= (bx+cx,by,cz) To me that doesn't look right, but I think I'm...

Hello All, I'm wondering if anyone knows of any sockets that will fit an LFCSP (CP-56) surface mount package? I want to put an AD9959 chip onto a protoboard and am wondering if there are any solderless sockets for it available. So far the only one I found was for high end processor chips and...

What's the definition of "vector components"? I mean that when I resolve a vector into two components, my teacher taught us to find its x-component which is on x-axis and y-component on y-axis, so if it be the case, then this vector must not be on either x-axis or y-axis but between. So is that...

Connected components not relatively open?!? I've been struggling with this problem. In a. I showed that if A is connected and B contains A but is itself contained in the closure of A, then B is connected. I must now show that the connected components of a disconnected subset A of a metric...

Homework Statement I have to find the x and y components of velocity. I'm given the original velocity of 65 m/s and the projectile is shot at an angle of 37 degrees. Homework Equations X component: Vx cos theta Y component: Vy sin theta The Attempt at a Solution X component...

please if possible send me the evaluation steps of independent components of a symmetric and antisymmetric tensor of rank 5 and dimension 999.

Hi -- I'm working on a physics problem that involves adding several vectors. I know that to find the components of a vector you must do some trig with the angle the vector makes with the x-axis. However, one of the vectors is parallel to the x-axis (but not actually laying ON the x-axis). I'm...

Homework Statement Consider a topological space X Show that every point of X is contained in a unique path component, which can be defined as the largest path connected subset of X containing this point. The Attempt at a Solution What happens if we take X=Q? There are no path connected subsets...

I need to find out where I can obtain: - A Isolation Transformer : 220VAC, 50 hz - 500 Watt Dimmer : 220VAC - Capacitor : 3uF 660VAC Polypopylen Capacitor - Car Ignition Coil : Preferably Ducellier but almost any will do - HV Tripler : 30 or 40 KV - Resistor : 470 kOhms, 5 Watts I am...

I've been doing tons of research on Fick's Law. I understand how to derive it and what its used for. I just need to see an example of it being used. I need to use this equation to separate water from an alcohol and aromatic component. Any help is greatly appreciated.

Homework Statement Homework Equations P = IV V = IR The Attempt at a Solution I know how to solve the problem once i figure out which parts are parallel and which parts are series. So would it be R2 and R3 are in parallel and R4 is series, but what about R1? i have done a...

Let R be a Noetherian Ring and I an ideal in R. Let I = Q_1 n ... n Q_r = J_1 n ... n J_r be two primary decompositions of I. How can I show the number of irreducible components in each decomposition is the same?

Riding the Train --Vecotrs & components A passenger train is cruising directly to the north at 16.0 mi/hr. what are the speed and (numerical) direction of a passenger with respect to the ground on this train, if he now walks east-ward at 5.4 mi/hr? ---Compass heading in degrees: N=0, E=90...

Homework Statement A particle with charge 9.42×10−8 C is moving in a region where there is a uniform magnetic field with a magnitude of 0.440 T in the +x-direction. At a particular instant of time the velocity of the particle has components -v_x = 1.70×10^4 m/s, -v_y = 3.19×10^4 m/s, v_z...

If a rod is traveling with a velocity 'v' and its proper length is L_0 will the lorentz transformations given below hold true for the length contraction L_0 = \frac {L} { \sqrt {1 - \frac {{v_x}^2} {c^2}}} L_0 = \frac {L} { \sqrt {1 - \frac {{v_y}^2} {c^2}}}

Recently, someone pointed me toward this news report, which I have cross referenced (only to find that everyone got their information from the same limited source). http://www.napa.ufl.edu/2004news/braindish.htm" As I understand it, rat neurons formed an interactive network with an...

Homework Statement A football player runs the pattern given in the drawing by the three displacement vectors A, B, and C. The magnitudes of these vectors are A = 5 m, B = 14.0 m, and C = 23.0 m. Using the component method, find the magnitude and direction of the resultant vector A + B + C...

Homework Statement http://img136.imageshack.us/img136/1930/carrs8.th.png Homework Equations a = (v^2/p) en + (v*)et a- accel v-velocity en- inward normal et- unit vector along tangent v*- tangential acceleration p- curvature The Attempt at a Solution FOr the first part I just need to find...

DFT - can't evaluate components in -negative time! hey guys - if you look at the definition/equation of discrete Fourier transform, you will see that we can only evaluat values from n=0 to N (see http://en.wikipedia.org/wiki/Discrete_Fourier_transform, to view the equation)...but what have we...

i am having a little problem. i have the acceleration in the x direction for an object but do not know how to change it back to regular acceleration. please help

Homework Statement A car of mass 1200kg has a distance (front to back) of 3.0m. On a horizontal surface, the front tires hold 60% of the weight. The CM is located at 0.8m off the road. Find the normal force on each wheel when the car is at rest on an incline of 20 degrees. The car is oriented...

a 1100N mass is suspended from a string which is supported by two poles. One side makes an angle of 70 degrees with the vertical and the other side makes an angle of 80 degrees. Find the two tensions using components. First I say that T1sin70-T2sin80=0 bcause the x forces have to be equal...

I am trying to integrate the the normal vector to the surface of a hemisphere but am having some trouble. I am pretty sure that the x and y components will cancel out, and that the z component in spherical coordinates is R*Cos[theta] but for some reason I am having trouble really understanding...

Hi, i am new to this forum and have just moved onto the second year of my BEng mechanical degree programme.We have been given the task of reverse engineering a 1.4l ford zetec s engine from a 1995/1997 fiesta. The problem we are having is identifying the materials used and the manufacturing...

The eye of a hurricane passes over Grand Bahama Island. It is moving in a direction of 60.0 (degrees) north of west with a speed of 41.0 km/h. 3 hours later, the course of the hurricane suddenly shifts due north, and its speed slows to 25.0 km/h. How far from Grand Bahama is the hurricane 4.50 h...