Lines Definition and 1000 Threads

Hello, This query isn't concerned with solving a problem, but only with details appendant to the problem. The question is as follows: A uniformly charged ring of radius 10.0 cm has a total charge of 64.0 µC. Find the electric field on the axis of the ring at the following distances from...

How look field lines in TOKAMAK? Do you have any picture? How I could physically make for a better understanding? (of paper, laser, ...)

Sorry for any errors in posting, this is my first thread. Any help would be greatly appreciated! Homework Statement a.)On the contour map that is attached, find the magnitude of the electric field at each point A, B, and C. b.)Calculate the work done in moving a 1C positive charge from point A...

a type II superconductor may not exhibit complete exclusion of magnetic field due to quantum vortices. It is my understanding that the magnetic field present will affect the number of vortices or fluxons present, but what is the relationship between magnetic field, and number of vortices in a...

I have four points on the same plane (a, b, c, d). Points a and b form a line ab. Points c and d form a line cd. Line ab and cd intersect at point e. Does anyone have a formula that can find the coordinates of point e?

As students taking pre-calculus, you are probably aware that when two lines are perpendicular, the product of their slopes is -1. Let's see why this is. Let one line be $\displaystyle y_1=m_1x+b_1$ and the other line be $\displaystyle y_2=m_2x+b_2$. Now,we know the angle of inclination of a...

[b]1. Explain what the CPU will do in terms of functuality and configuration when executing the C source code below: unsigned char value = 0x91 1) BSR = 5; 2) BSRbits.3 = 1; 3) INTCONbitsTMR0IE = 1; 4) INTCON2bitsTMR0IP = 1; 5) TRISB = 0x00; 6) PORTB = 0x00; Please can...

Hi there. I have a problem regarding interpolation between lines. I have to say that I have never done it before and I can't find relevant info on the internet, so I am asking for your help. the graph in question can be found here: http://s9.postimage.org/kmj94nexb/physicsforum.png I do...

Homework Statement In an interference pattern produced by two point sources separated by 3.5cm and vibrating in phase, the first order nodal line forms an angle of 20 degrees with the perpendicular bisector of the line segment joining the two sources. What is the wavelength? How many nodal and...

Homework Statement Draw the field lines between two parallel plates with +3V on one plate and +1V on the therHomework Equations The Attempt at a Solution The answer is (D) for a uniform field between the plates, however when two positive charges are drawn the field lines diverge as in (B)...

Let T : R2 -> R2 and S : R2 -> R2 be linear transformations defined by: T(x; y) = (5x + y ; 2x + 2y) and S(x; y) = (3x + 2y ; x): (i). Find the image of the line 2x + 3y = 5 under T. (ii). Find the natural matrices of the linear transformations T o S and T^-1 Sorry, I haven't done...

Homework Statement We consider two points, B and I and a line 'a'. B(0,-4,-7) I(-2,-2,-5) and a: x = y+1 = (z-2)/2 Determine the summits of A and C of triangle ABC knowing that: -Summit A belongs to the line 'a' -I is the foot of the height from A (perpendicular to BC) -The...

Let two circles $T_1$ and $T_2$, ($T_1$ is smaller than $T_2$), intersect at points $C$ and $E$. Let the tangent to $T_1$ at $C$ meet $T_2$ at $A$. From $A$ another tangent to $T_1$ is drawn which touches $T_1$ at $B$ and meets $T_2$ again at $D$. Let $F$ be the foot of perpendicular from $B$ to...

Why is there a central line when a magnet is used to split the electrons? I would have thought that since electrons have two characteristic states that one type would go one way and the other type the other way so the middle should be blank.

Cosmic greetings, I am reading up on active galaxies, and 'strong' and 'broad' emission lines are mentioned everywhere, yet no definitions given. Do they mean that the object is emitting energy across a large part of the spectrum, or that it's emitting a lot of energy? Also, I am confused...

Hey guys, just wanted to get a quick check that this proof is sound. Homework Statement Let L, K be two parallel lines, and let F be an isometry. Prove that F(L) & F(K) are parallel. Homework Equations If P and Q are points on the plane and F is an isometry, the distance PQ = the distance...

can anyone tell me how to calculate the electric lines of force of an arbitrary electric charge configuration ? i have heard that in static case there is no electric field inside a conductor . i now want to know that is there any dynamical case for the conductor instead of static ?

Homework Statement 1. Given n non-parallel lines such that no three intersect in a point, determine how many triangles are formed? 2. Given n lines in total, of which m are parallel, how many triangles are formed? Homework Equations Combination nCr (n choose r) The Attempt at a...

Linearity vs. "takes straight lines to straight lines" Homework Statement Prove that if ##\Lambda:\mathbb R^n\to\mathbb R^n## is a bijection that takes straight lines to straight lines, and is such that ##\Lambda(0)=0##, then ##\Lambda## is linear. Homework Equations Fock's theorem implies...

i have read that if we place an unit positive electric charge in an electric field the path in which it moves is the electric lines of force of that electric field . is it true ? and again that the lines of force doesn't make a closed curve . is that also true ? if yes then if we can make a...

Hello - I need help finding collinear points: Given: Equations of 2 lines, L1 and L2 1 points, P3 Want to find points P1 and P2 that lie on L1 and L2 respectively that are collinear to P3. I know that there can be multiple combinations of points P1 and P2 so to narrow down the list...

http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w09_qp_31.pdfHomework Statement 6i Homework Equations r=a+λb The Attempt at a Solution first i find AB which is (2,2,-2) the equation if line is then...

Dear Physics Forums readers Let a two dimensional rectangle R1 carry a surface charge \sigma and be placed next to another rectangle R2 of the same shape made from metal (i.e. a conductor). What does the electric field look like close to the second rectangle? My intuition would tell me, the...

Homework Statement The tangent lines of two circles intersect at point (11/3,2/3). What are the two points that each tangent line touches on its respective circle? Homework Equations Circle 1: x^2 + (y-3)^2 =5 Circle 2: (x-2)^2 + (y+3)^2 = 2 The Attempt at a Solution I found the...

What's the difference between trends and regression lines (linear and non-linear) which minimize the residual sum of squares?

Hi, I was wondering - In the plots that we see of magnetic lines of force (like this one) what exactly are they plotting against what? Meaning is it Bx vs x vs y, or is it Bx vs By vs Bz?

When people talk about sunspots and the solar cycle and stuff like that, they often mention magnetic field lines poking through the surface of the sun. I'm pretty sure I get why the magnetic field lines would be twisted up by the non-uniform rotation of the sun, and why they would poke out of...

What would be the pattern of electric field lines 'inside' a solid charged sphere..?

Why can't two field lines intersect? The answer that i have often heard is that if they were to intersect, then there would be two different directions for force. But then two field lines can interesct in such a way that their tangetes at the point of intersection point in the same direction. (...

Suppose you have two lines that intersect at the point O. Let's say the lines are OP and OQ. Could you construct a plane that contains both these lines? I can visually imagine this happening in the 3-space, but I may be wrong. I was just wondering, because this allows one to define an angle...

Homework Statement Find the equation of all straight lines, if any, that are tangent to both the curves y = {x^2} + 4x + 1 and y = - {x^2} + 4x - 1.Homework Equations The Attempt at a Solution Suppose such a line exists and its slope is m. Let ({x_1},{y_1}) and ({x_2},{y_2}) be the tangent...

Homework Statement In my electromagnetism lab, we had one electrode connected from the negative end of a power supply to one end of a conductive sheet, and the other electrode connected from the positive end of the supply to the other end of the conductive sheet. The potential difference of...

Homework Statement Given: AB \coprod CD ; \angleA \cong \angleC Proof: AD \coprod BCHomework Equations Idk how to necessary finish it...The Attempt at a Solution Statement -------------- Proof 1. AB \coprod CD ; \angleA \cong \angleC ----------- 1. Given 2. I say \angleA is supp. \angleD and...

Does the function f(x) l x2-1 l have a tangent line at x=1? What is the tangent line if it does? Attempt: l x2-1 l (x2-1) When x ≥ 1 -(x2-1) When x < 1 Lim x→1+ (x2-1) = 0 Lim x→1- -(x2-1) = 0 Therefore, it does have a limit because the right and left hand limit are equal and the slope...

I have two questions involving lines and planes. They're both fairly simple, but I'm stuck. I'm sure someone is going to point something out and it's going to make me smack my forehead. Homework Statement Where does the line through*(1, 0, 1) and (4,*−2,*4) intersect the...

Homework Statement The two lines are in symmetric equations. L1 is (x-1)/2=(y+1)/3=-z. L2 is (x+1)/2=(y-1)/3=3-z. Find the equation of the plane containing the lines. The point on L1 is (1,-1,0) with slope of (2,3,-1) The point on L2 is (-1,1,3) with slope of (2,3,-1) Homework Equations...

Homework Statement Calculate the spectral interval (λmax, λmin, and Δλ) in which all the lines of the Lyman, Balmer, and Pashcen series (excluding their continuous parts) of the H-atom are found. Homework Equations Here is where I am confused.. do I use the Balmer's formula for H...

Let's say I have a circle filled with positive charges. Some distance away I have an identical circle filled with negative charges. Since the distribution is uniform in the circles, I can just use the center of the circles as points and calculate the field lines between the two. So far so good...

Homework Statement Lines li: ix+(i+1)y+(i+2)=0; i=1,2 intersect at___ point? Homework Equations The equation is required at first! The Attempt at a Solution I am confused! How and where should I replace the values of i with 1 or 2? This is the first step but i am unable to do...

Say we take N random points in a volume V and connect the points pairwise with line-segments. I would like to estimate the number of segments that intersect some small volume v, and where N is large enough so that any small random sample volume v will have many intersections. Little volume v may...

Hello Everyone, I have a 5 ampere weighing equipment & need it to ground properly. It is about 80 feet away from soil point. (Direct wire to the equipment will be used & long term connection is required). Manufacturer says that: "There must be a good third wire ground, preferably to a...

The Feynman diagram you'd naively draw for a beta decay such as p\rightarrow n + e^++\bar{\nu} would have four lines joined at a vertex, but in reality there's a virtual W or Z involved, which makes it into two 3-vertices. Is there any fundamental reason why all the vertices in a field theory...

1.There is a circle with the equation x^2 + y^2 - 2ax = 0. A line is drawn through the centre of the circle which is parallel to the line x+2y=0. and also intersects the circle at A and B. Find the area of the triangle AOB. My attempt- I calculated the slope of the given line(-1/2).So the...

1. A point P(x,y) is given equidistant from the points A(a+b,b-a) and B(a-b,a+b), then prove that bx = ay also find the locus of the variable point Z(a cos (theta), b sin (theta)), where (theta) is a variable quantity. 2. T0 prove that ax = by 3. In an attempt towards...

A 3-dimensional graph has infinite number of derivatives (in different directions) at a single point. I've learned how to find the partial derivative with respect to x and y, simply taking y and x to be constant respectively. But what do I do if I want to take the partial derivative with respect...

There are various roads from SR to GR. In a couple of years I may get a chance to teach a semester-length class on relativity for liberal arts students. Any comments on what story line works best? Some possibilities: (1) Thought experiments with elevators suggest that the Newtonian...

Homework Statement The problem is attached as TheProblem.jpg and the answer is A. Homework Equations Geometry rules. The Attempt at a Solution The triangle which has angles of 30deg and 10deg also has an angle of 180deg-30deg-10deg = 140deg and the other side of the line intersection...

I recall that the path of light itself can be altered by gravity, then, being part of the electromagnetic force, then is it safe to assume that the paths of electric fields lines can also be warped? I would imagine that the consequences would be enormous for electric flux in curved space...

Homework Statement Show that these lines intersect and what is the intersection point? x=1+t y=2t z=1+3t and x=3s y=2s z=2+s Homework Equations The Attempt at a Solution I don't know how to start, some help please.

Electric current -- High voltage power lines buzzing Question: High voltage power lines string along roads often give off a faint buzzing sound. Use what you know about the motor principle to explain the source buzzing. ok, so i have no idea how to approach this. I've never heard...