Magnitude Definition and 1000 Threads

Homework Statement A) Find the magnitude of the net magnetic field at point P and point Q B) Reverse the directon of the current for the wire on the x-axis Homework Equations B = μ0I/2πr The Attempt at a Solution Solution attempt attached. Only attempted part A, since I probably won't get...

Homework Statement Three point charges, q1 = -4.19 nC, q2 = 5.41 nC and q3 = 2.51 nC are aligned along the x-axis as shown in the figure below. http://imgur.com/RaRML Assume that L1 = 0.496 m and L2 = 0.816 m. Calculate the electric field at the position (0, 2.02). Homework Equations...

Homework Statement A -14.3 nC point charge and a +24.9 nC point charge are 17.4 cm apart on the x-axis. What is the magnitude of the electric field at the two points on the x-axis where the electric potential is zero? Homework Equations V = kq/r E = kq/r^2 The Attempt at a...

vector A has a magnitude of 81 units and points due west, while vector B has the same magnitude and points due south. Find the magnitude and direction of (a) A + B and (b) A - B . Specify the directions relative to due west. (a) Magnitude and direction of A + B = and o (b) Magnitude and...

Hi guys, sorry to ask such a basic question, but I'm studying for the MCAT and need to get my fundamentals down! Anyway, my question is this: Consider an object which has been thrown straight up into the air. It will rise, then at the very top of its ascent, it changes direction and comes...

Homework Statement Hi, here is the problem I'm having trouble with: Three charges Q1, Q2, and Q3, each equal to 6.4 × 10–19 C, are in a straight line. The distance between neighboring charges is 60 nm. Find the magnitude of the electric field at P, which is 80 nm from Q2 on a line at right...

Homework Statement A 2.0-kg mass (m1) and a 3.0-kg mass (m2) are on a horizontal, frictionless surface, connected by a massless spring with spring constant k = 140 N/m. A 15-N force (F) is app0lied to the larger mass, m2, as shown in the figure: |__m1__|-/-/-/-/-|____m2____| ----------> F...

1. Find the magnitude of resultant of OA, OB and OC ( there is an arrow sign upwards of OA, OB and OC showing these are vectors.) (Sorry but i am not good at making computer drawings.)The Attempt at a Solution I tried to find the resultant of OA and OC and then the angle of resultant with OA...

Why is it that things appear smaller the farther they are away and bigger the closer they are away? It is almost as if the magnitude of their dimensions (length, width, and height)changes. But in reality it is still the same object. My cup x distance closer to me than the door may appear 1/6th...

Hello, Analyzing data from a chaotic pendulum, I calculated the Lyapunov exponent to be somewhere around 10^5 . While my gut tells me something is wrong with this number , i failed to find any information regarding the order of magnitude of Lyapunov exponents and their meaning. Can someone...

Homework Statement A proton has mass 1.7×10−27 kg. What is the magnitude of the impulse required to increase its speed from 0.991c to 0.994c? Homework Equations Impulse = mV_f{}-mV_i{} The Attempt at a Solution Impulse = mV_f{}-mV_i{} = 1.7e-27*(.994*3e8)-(1.7e-27*(.991*3e8)) =...

Homework Statement you have a vector with a magnitude of 2400# positioned at 120 degrees in a counter clockwise from the positive "x" axis, determine the x and y components of the vector. Homework Equations The Attempt at a Solution I have never had physics before and am lost on...

Hi All, I have a photo of the ISS and i wanted to calculate its absolute magnitude and compare it to the predicted mag when the photo was taken I've found the pixel value for a point on ISS and i have also found the pixel value for an identified star in the background. How would I...

Homework Statement A rectangular conducting loop of dimensions l×w and resistance R rests in the plane of a long straight wire as shown. The closest edge of the loop is a distance a from the wire. The current in the wire is in the upward direction and increases at a constant rate from I to...

Homework Statement a skater moves from point A to C in a circulaire path as shown in the picture C is the end of the circular path find R the force that the ground exerts on the skater at point C using Newten's second law there is no friction nor air resistance Homework Equations p-R=maThe...

Homework Statement A projectile of mass 0.656 kg is shot straight up with an initial speed of 25.4 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 7.64 m, determine the magnitude of the average force due to air...

pls see the attachment. so pretty much magnitude of acc would be root (at2 + an2). i figured out an by subbing it into v2/p. but i can't figure out how to calculate at! id really appreciate the help, I've been at it for 3 hours now! thanks!

Im studying for a final, there are a few questions about rotational motion that i have, can anyone please help? A 5.2 kg disk of radius 2.3 m initially rotates about its axis at 6.4 rad/s. A tangential 7.4-N frictional force is applied to the rim of the disk. How many revolutions does the...

Homework Statement You have a solid, non-conducting cylinder of radius a, length L, and a total charge of Q. Concentric with this is an uncharged conducting cylindrical shell of inner radius b and outer radius c. Find the magnitude of the electric field for values of r where r < a...

Figure 1a shows a system of forces is pulled an object on different directions. 1a) Determine the magnitude and direction of the resultant force for the system of forces shown. 1b) Explain the changes of magnitude and direction of resultant force for the system of forces based on the...

Homework Statement A proton, with mass 1.67*10^-27 kg and charge +1.6*10^-19C, is sent with velocity 5.0*10^4 m/s in the x-direction into a region where there is uniform electric field of magnitude 390 V/m in the y direction. What is the magnitude and direction of the uniform magnetic field in...

Homework Statement A 2KG mass has been graphed to increase in force after 3 meters east to 4 Newtons. it maintains 4 Newtons for 2 more meters east and then decreases back to 0 after 7 meters ..._ _/..\__...__ shape graph. I am trying to find out its magnitude of velocity at 7.4 Meters...

1. A circular loop of wire of radius R = 5.14 m lies in the xy-plane, centered about the origin. The loop is carrying a current of I = 6.91 A flowing in counterclockwise direction. Consider two l = 1.52 mm segments of the loop: one centered about the positive x-axis, the other centered about the...

Sorry if I should be posting as homework, but it's not homework anymore and I'm just curious about the answer. My question is simple and doesn't require answering the actual homework question I had. If there is a force on a charge in one inertial frame of reference, will there also be a force...

Homework Statement An engine supplies an upward force of 9.00N to an initially stationary toy rocket, of mass 54.0g, for a distance of 25.0m. The rocket rises to a height of 339 meters before falling back to the ground. What was the magnitude of the average force of air resistance on the...

Quantum Jitter is supposed to fill space with very dense energy that the cosmological constant should increase by over 120 magnitude. Yet it is not so and the worse prediction ever made by physics as they say. Could the reason this be so is because virtual particles are just figment of the...

calculating magnitude and orientation of a resutanr force? • A mass of 10 kg has 3 forces exerted against it, as shown in the diagram below. Given the information below, calculate the magnitude and orientation of the resultant force. F1 has a magnitude of 10.5 N, with θ = 15° to the horizontal...

Please note, I'm not in school anymore -- just a basic physics question! Homework Statement A conductor is placed inside the coil of an induction heater. Imagine that the inductor coil has radius R, number of turns N, operating frequency f [Hz], drawing current I = I0 * sin(2*pi*f*t). The...

Hello; Homework Statement "The point C lies between A and B and is 5 units from A. OA = 2i + 3j OB = -4i - 5j Find OC." Homework Equations Pythagoras' Theorem The Attempt at a Solution This is not exactly a homework question since this is independent study, but I was...

Homework Statement In a certain region, the Earth's magnetic field has a magnitude of 5.30e-5 T and is directed north at an angle of 57° below the horizontal. An electrically charged bullet is fired north and 11° above the horizontal, with a speed of 681 m/s. The magnetic force on the bullet...

Q. An aeroplane flies at constant altitude due south over London. Its speed is 320 km/h and the latitude of London is 51 degrees North. What is the magnitude and direction of the Coriolis acceleration on the aeroplane? Do I use Coriolis acceleration = 2ω x v to find acc? Is ω = 2π /...

Homework Statement whats |r'(t)| if r'(t) is <1,2t,3t2> Homework Equations The Attempt at a Solution im finding normal and binormal vectors and i need to divide r(t)/r'(t) |r'(t)| = sqrt (12+(2t)2+(3t2)2) how does that simplify down to something that can be an appropriate...

Supposedly, you use a certain type of seismometer. But in that case, how could a deep earthquake far away register as "higher" than a shallow earthquake that's up close? Sure, the deep earthquake may release more energy, but much of it is dissipated by the time it reaches the seismometer (and...

Homework Statement A 0.42 kg particle moves in an xy plane according to x(t) = - 19 + 2 t - 2 t3 and y(t) = 25 + 8 t - 7 t2, with x and y in meters and t in seconds. At t = 0.6 s, what are (a) the magnitude and (b) the angle (within (-180°, 180°] interval relative to the positive direction of...

Hi, I'm looking for some help on how the sum of a certain number of vectors can equal zero. I know that the sum of 2 vectors with equal magnitudes but opposite directions will equal zero; 2 vectors of unequal magnitude can never have a sum equal zero; and that three vectors of unequal...

Homework Statement a square of sides 10cm has four charges at each corner starting clockwise from top right they are 5,10,6 and 3nC. Determine the resultant electric field including magnitude and direction at the centre of the square. Owww and the medium is air. Finally what is the force on...

Homework Statement Location A is 3.04m to the right of a point charge q. Location B lies on the same line and is 3.87m to the right of the charge. The potential difference between the two locations is VB - VA = 45.0V . What is the magnitude and sign of the charge? Homework Equations...

Homework Statement Two vectors have equal magnitude of 14.8 m and the angles are theta 1 = 32 deg & theta 2 = 108 deg. Find a) their x component b)their y component of vector sum \vec{}r c) the magnitude of \vec{}r & d) the angle \vec{}r makes with the positive direction of the x axis...

Hi guys, first post (hopefully not only). If 2 stars are in an apparent binary system, how do you calculate the "combined apparent magnitude" of the system if you know both their apparent magnitudes and their distance from you. I can work out the apparent magnitude (even though that's not...

Homework Statement A closed surface with dimensions a = b = 0.254 m and c = 0.4064 m is located as in the figure. The electric field throughout the region is nonuniform and given by ~E = (α + β x^2)ˆı where x is in meters, α = 4 N/C, and β = 6 N/(C m2). Picture of object attached...

Homework Statement The wire in Figure 21-40 carries a current of 12 A. Suppose that a second long, straight wire is placed right next to this wire. The current in the second wire is 28 A. Use Ampère’s law to find the magnitude of the magnetic field at a distance of r = 0.72 m from the wires...

The unit tangent vector, T(t) = r'(t) / || r'(t) || always has length 1. Alright, so how do we get a sense of the length of the actual tangent vector itself? Its direction is easy to imagine, but I can't understand how its magnitude changes along the curve (does it have something to do with...

Homework Statement A pendulum has a length L = 1.36m. It hangs straight down in a jet plane about to take off as shown by the dotted line in the figure. The jet then accelerates uniformly, and while the plane is accelerating, the equilibrium position of the pendulum shifts to the position...

Homework Statement Given a sphere of radius R with a uniform charge distribution Q, what is the magnitude of the electric field at a point p0 inside of the circle? Homework Equations Flux = 4 pi r^2 E = Q/epsilon The Attempt at a Solution So I was watching an MIT lecture online...

Homework Statement What is the magnitude of the resultant of the following vectors? 5N, East 8N, 30 degrees West of North 2N, East 7.5N, 23.5 degrees West of South Is there a way to solve this using a calculator? Any help would be great.

Homework Statement Find the magnitude and direction of 4 concurrent coplanar forces: 10N 32 degrees east of north 35N 50 degrees east of north 25N 72 degrees east of north 85N 40 degrees east of south Any help would be greatly appreciated.

Homework Statement Find the magnitude of the resultant of the following series of vectors. 120N, North 190N, 60 degrees East of North 70N, 10 degrees East of South 150N, 45 degrees South of West I have similar questions like these and not sure how to answer them, if anyone can help...

Homework Statement Find the magnitude and direction of 3 coplanar forces of: 40N 45 degrees east of south 10N west 70N 35 degrees east of north This is all new to me so anyone that can show me and hopefully explain how I can get the answer would be great.

Homework Statement The vector -1.90A has a magnitude of 59.1 m and points in the positive x direction. Calculate the x component of the vector A. Calculate the magnitude of the vector A. Homework Equations 3. The Attempt at a Solution I understand vectors but having a...

Homework Statement Two forces F1 and F2 are acting on a mass M=4kg. The force F1 = 7i + 6j + 8k, in N. The acceleration of the mass is given by a = 1i + 3j + 2k, in m/s2. Calculate the magnitude of F2 . Homework Equations F=ma The Attempt at a Solution F1+F2=ma m=4kg...