Magnitude Definition and 1000 Threads

Homework Statement In the sum A+B = C, vector A has a magnitude of 10.0 m and is angled 46.5° counterclockwise from the +x direction, and vector C has a magnitude of 15.0 m and is angled 23.5° counterclockwise from the -x direction. What are the magnitude and the angle (relative to +x) of B...

cross product question.. "find the magnitude of the force" Homework Statement A wrench 0.9 meters long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of <0, 3, -2> at the end of the wrench. Find the magnitude of the force in Newtons...

Urgent! Question Problem! Please Help! 1. Homework Statement [/b] In the sum A-> + B-> = C->, A-> vector has a magnitude of 13.8 m and is angled 44.0° counterclockwise from the +x direction, and vector C-> has a magnitude of 16.8 m and is angled 18.8° counterclockwise from the -x direction...

Homework Statement The first question that was asked was; What is the total charge of the radon nucleus? (The neutral radon atom has 86 electrons.) the answer to that is 1.38*10^(-17) C the second question asked is; What is the magnitude of its electric field at a distance of 6.0 x10-(10)...

Homework Statement Given the following force vectors: A is 27 lb at an angle of 28° clockwise from the +x-axis, and B is 44 lb at an angle of 52° clockwise from the +y-axis. (a) Using the method of components find the magnitude and angle of the vector C such that 2A + C − B results in a vector...

Homework Statement Points A, B, and C are at the vertices of an equilateral triangle. A certain positive charge q placed at A produces an electric field of magnitude 145 N/C at C. Suppose a second, identical charge is placed at B. What is the magnitude of the new electric field at C...

Homework Statement If b is added to c = 3.9i + 3.7j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of c. What is the magnitude of b? 2. The attempt at a solution I've probably just been staring at these problems for too long... First of...

I know that energy is equivalent to mass and that a proton is many times more massive than an electron and yet the charges are equal in magnitude in both. How is it the electron is able to match the protons charge with so much less mass? What is it about its configuration that enables it to...

Problem is here http://engineeringhomework.net/statics/FG02_32-03UNP62.JPG Determine the magnitude and coordinate direction angles of the resultant force. I don't know where to start on this one.

Homework Statement Consider a long, uniformly charged, cylindrical insulator of radius R and length l with charge density 1.8x10^-6 C/m^3. The value of the permittivity of space is 8.85419 × 10^−12. What is the magnitude of the electric field inside the insulate at a distance 1.3cm from the...

Homework Statement [PLAIN]http://img406.imageshack.us/img406/3756/fmp1.jpg How do I calculate the magnitude of the sum of these 3 vectors? Also, how do I find the angles the sum of the vectors make with each axis? F1 = 260N F2 = 75N F3 = 60N Homework Equations F = F1 + F2 + F3The Attempt at a...

Homework Statement A nucleus that captures a stray neutron [in a nuclear reactor, for example] must bring the neutron to a stop within the diameter of the nucleus by means of the strong force.That force, which "glues" the nucleus together, is approximately zero outside the nucleus. Suppose...

Homework Statement Find the magnitude of the electric force between a Na+ ion and a Cl- ion separated by .5 nm. Homework Equations |F| = (kQq)/r^2 The Attempt at a Solution So the problem I am having with this question is this: my first attempt at a solution was to designate |Q| =...

Homework Statement Three charges are arranged as shown in the diagram below. Their magnitudes are: q1 = +2.5 x 10^-17 C q2 = +3.0 x 10^-17 C q3 = +3.5 x 10^-17 C (its a right angle triangle, with 50 cm as the hypotenuse, 40 cm as the horizontal, and 30 cm as the vertical) Figure image...

A baseball player hits a line drive. Just before the ball is struck, it is moving east at a speed of 37.6 m/s (84 mi/h). Just after contact with the bat, 1.05x10^-3 s later, the ball is moving west at a speed of 51 m/s (114 mi/h). Find the ball's average acceleration. So i know that to find...

Homework Statement Consider the three displacement vectors A = ( -2i + 3j ) m, B = ( 2i + 7j ) m, and C = ( -7i + 5j ) m. Use the component method to determine the following. (a) The magnitude and direction of D = A + B + C |D| = ___ m θ = ___° (from the +x axis) (b) The magnitude and...

Homework Statement The figure shows an electron entering a parallel-plate capacitor with a speed of 5.4×106m/s. The electric field of the capacitor has deflected the electron downward by a distance of 0.618cm at the point where the electron exits the capacitor. Find the magnitude of the...

Homework Statement See figure attached for problem statement. Homework Equations The Attempt at a Solution I can see that the y-components of each particle will cancel each other out so we are solely looking at how the x-component forces of each particle affect the field at the...

Homework Statement A flat, circular annulus of radius 7 m with a hole in the center of radius 2 m is charged on one surface such that the surface charge density varies with the radial distance from the center of the disk by the equation sigma= (r2 + 961)1/2 x 10-6, where is in C/m2 and r is in...

pretty straightforward question. for a long time I've been blindly calculating that intensity is (displacement from zero)^2, but never questioned why. So why is this? I get that by squaring you get a positive value, which helps in, say, quantum probability calculations, but what's wrong with...

Homework Statement Find the magnitude of \frac{6t(-3t^2\hat{i}+\hat{j})}{(1+9t^4)^2}Homework Equations The Attempt at a Solution I know how to take the magnitude for something simple like 3x \hat{i} + 8y \hat{j} + 2 z \hat{k} but not this. My lecture notes don't give me any examples of how to...

I see that general relativity uses tensors to calculate curvature. How exactly does relativity calculate actual curvature. Are the units of curvature m^-1, like regular curvature units? For example, using SI units Ruv - 1/2guvR = (8πG/c^4)Tuv R00 - 1/2g00R = (8πG/c^4)T00 R00 + R/2 = 8πGρ/c^2...

Homework Statement A soccer player accelerates a 0.50 kg soccer ball by kicking it with a net force of 5.0 N. Calculate the magnitude of the acceleration of the ball. b. What is the magnitude of the force of the soccer ball on the player's foot. Homework Equations a=fnet/m...

Homework Statement A ball of mass 350g is traveling with a speed of 4m/s when it hits at right angles a fixed vertical wall. The ball rebounds with a speed of 3m/s. Find the magnitude of the impulse exerted by the ball on the wall. Using a simple diagram show the direction of velocities and...

Homework Statement Find the magnitude of momentum of electrons in a straight wire of copper of length 1 meter carrtying a current of 16 ampere. a) 14.56e-12 kg m/s b) 29.12e-12 kg m/s c) 18.2e-11 kg m/s d) 91e-12 kg m/s The answer is (d) Homework Equations The Attempt at a...

1. Two masses are connected by a light string. The horizontal mass of 2 kilograms is being pulled to the left with a force of 30 Newtons along a frictionless surface. The vertical mass is 1 kilogram. What is the magnitude of the tension in the connection string? 2. Fnet=ma 3. My...

Hi: I'm wondering where I can find a table with the magnitude and duration of inrush on the many various lighting technologies at the various levels they come in. Any suggestions? Thanks!

Homework Statement If Q=80nC, a=3.0m , and b=4.0m in the figure, what is the magnitude of the electric field at point P? Homework Equations EF=k*Q1*Q2 / R^2 The Attempt at a Solution I'm not sure how to go about solving this problem. Do I use the above equation? I don't have...

Homework Statement A force of F = (3.00 i - 2.00 j) N acts at a location r = (1.00 i + 2.00 j) m on an object. What is the magnitude of the torque that this force applies about an axis through the origin perpendicular to the xy plane? Homework Equations Torque is equal to the cross...

Homework Statement A 20 V emf is placed across 2 resistors in a series, a current of 2 A is present in each of the resistors. When the same emf is placed across the same 2 resistors in parallel, the current through the emf is 10 A. What is the magnitude of the greater of the 2 resistances...

Homework Statement Forces with magnitude of 200 Newtons and 300 Newtons act on a hook. The angle between the two forces is 65°. Find the magnitude of the resultant of these forces. Round your answer to 2 decimal places. (Hint: write the 300 pound force as a vector in the direction of the...

Not really homework. But I am programming a game. It is using planetary gravity to make a spaceship go into orbit. I have it so that I find the magnitude of gravity and the direction the planet is in from the ship. I need to make gravity act on the ship in the direction of the planet. I thin...

Homework Statement The angular position of an object that rotates about a fixed axis is given by \theta(t) = \vartheta e^\betat, where \beta= 2 s^−1, \theta = 1.1 rad, and t is in seconds. What is the magnitude of the total linear acceleration at t = 0 of a point on the object that is 9.2 cm...

Homework Statement Two stars are in a circular visual binary system. The orbital period of the binary is 30 years. The distance to the binary is 20 parsecs. The angular radius of the orbit of each star is 1". What are the masses of the two stars? each star works out to be 4.4 solar...

What are the magnitude and direction of the electric field strength at point Z in the following: Point X, q1 = -2.0 x 10^-5 and it is 60 cm to the left of point Y, q2 = 8.0 x 10^-6, which is 30 cm to the left of Z. Essentially, this is what it looks like: X-------Y--Z

Homework Statement State the magnitude of the terminal potential difference between two supply terminals which are connected to a piece of lead with negligible resistance. The EMF of the circuit is 5000V with internal resistance of 2,000,000 Ohms. I don't really understand what "magnitude"...

Homework Statement A three-tiered birthday cake rests on a table. From bottom to top, the cake tiers weigh 16 N, 9 N, and 5 N, respectively. What is the magnitude and direction of the normal force ating on the second-tier? Homework Equations FN=FWcos(theta) The Attempt at a Solution...

Homework Statement A sled is pulled at a constant velocity across a hrizontal snow surface. If a force of 8.0 x 10^1 N is being applied to the sled rope at an angle of 53 degrees to the ground, what is the magnitude of the force of friction of the snow acting on the sled? Homework...

Hello, I am trying to find out how my teacher got the magnitude of this expression. This is the original expression: 1/(1 + jwRC) j is an imaginary number Then, he ends up with 1/(sqrt(1 + (wRC)^2)). I get something nasty like: sqrt(2/(1 + 2jwRC - wRC)) Thanks.

Homework Statement A crate with a total mass of 50 kg is initially at rest on a level floor. A horizontal force of 150N pushes the crate across the floor at a constant acceleration of 1.2m/s2. What is the magnitude of the frictional force acting on the crate? Homework Equations The...

Homework Statement About 50 years ago, the San Diego Zoo, in California, had the largest gorilla on Earth: its mass was about 3.10 * 10^2 kg. Suppose a gorilla with this mass hangs from two vines, each which makes an angel of 30 degrees with the vertical. Draw a free-body diagram showing these...

Homework Statement A single proton and a single electron are fixed at a distance of 2.8 meters from each other. Find the magnitude of the electric force of attraction between them. i have the answer to this, it is: 2.93*10^-29 but now it asks: Find the magnitude of the gravitational...

Homework Statement A wheel of diameter 26.0 cm is constrained to rotate in the xy plane, about the z axis, which passes through its center. A force F = ( - 31.0 i + 49.0 j )N acts at a point on the edge of the wheel that lies exactly on the x-axis at a particular instant. What is the...

Homework Statement I have this equation and need to find |F|2 (which should be real). I thought you did this by multiplying by the complex conjugate which was just replacing all i with -i, but this doesn't seem to work. What am I doing wrong? Thanks Homework Equations The...

An object of mass 1.25 kg on a flat surface has two forces acting on it, F1 and F2 in the horizantal direction. F1 acts in the positive direction, F2 acts in the negative direction. The magnitude of F1 is 26.75 N. The object moves strictly along the horizontal x-axis, which we choose as positive...

Homework Statement Consider four vectors ~ F1, ~ F2, ~ F3, and ~ F4 with magnitudes F1 = 59 N, F2 = 29 N, F3 = 11 N, and F4 = 60 N, θ1 = 150 ◦, θ2 = −150 ◦, θ3 = 23◦, and θ4 = −56◦, measured from the positive x-axis with counterclockwise positive. What is the magnitude of the resultant...

Homework Statement Consider the two vectors r1 and r2 shown in the diagram. The magnitudes of the two vectors are: r1=6.1 and r2=9.3. The vectors directions relative to the x-axis are defined by the angles: θ1=25 degrees and θ2=51 degrees What is the magnitude of the vector R=r1+r2? A =...

Homework Statement A 12-g coin slides upward on a surface that is inclined at an angle of 12° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.35. Find the magnitude and direction of the force of...

Homework Statement A car of mass 1164kg was traveling around a 288m radius corner at a speed of 10.8m/s. What was the magnitude of the fiction force required to maintain the vehicles path? Homework Equations F=ma I have no idea after that The Attempt at a Solution I found mg =...

Homework Statement A little assistance with this question:- A vector, B, when added to the vector C = 3i + 4j yields a resultant vector which is in the positive y direction and has a magnitude equal to that of C. What is the magnitude of B? Homework Equations The Attempt at a...