Pole Definition and 368 Threads

In reading my physics book, there was mention of different types of poles. I was hoping someone could explain the differences and possibly supply a visual representation of the poles with respect to each other as to where they lie on Earth. The different poles were the magnetic N/S, geographic...

Homework Statement A nickel pole is put in an AgNO3 solution with volume 50ml and concentration 0.1 mol/litre until the concrentration is 0.02 mole/litre. Find the mass of Ag that is put around the Nickel pole. Homework Equations 2AgNo3+Ni->Ni(NO3)2+2Ag number of moles= concrentration*volume...

Homework Statement A pole of Zn is put in a FeCl2 solution and in a HgCl2 solution. FInd in which case the mass of the pole of zinc has become grater and when less Homework Equations Zn+FeCl2->ZnCl2+Fe Zn+HgCl2->ZnCl2Hg The Attempt at a Solution As Zn is much active than Hg than it goes in...

Homework Statement A rod extends from a vertical wall at an angle of 27º from the horizontal. A 2.5-kg lamp is mounted at the end of the rod. After John throws his 300-g winter coat over the lamp, what is the magnitude of the tension in the rod? The answers choices are: A) 30N B) 70N C) 27N D)...

Homework Statement I need to design a steel pole in 3 segments.The base segment needs to be 25 ft high , the second segment needs to be 15 ft and the third one 10ft high.So that when mounted on top of one another their total height will be 50 ft.Their diameters need to be within 1.6-7 inches...

Sweeping over the south pole of Mars An unusual observation by Mars Express shows a sweeping view over the planet's south polar ice cap and across its ancient, cratered highlands. Continue reading...

In slip test, we provide a constant 3 phase voltage across the stator of the machine. Then why does that voltage vary? Its like a variable inductor circuit due to different air gap length but basically if the voltage impressed is kept constant, why does the voltmeter show variation? Is it like...

From the north pole, how high is the sun @ midnight on the summer solstice ? Thanks

Why is there no West Pole and East Pole? There's a North Pole and a South Pole, but no West Pole and no East Pole.

I was thinking about this for a while now but I coudn't explain it, si here is it :, We have and athlète holding a horizental 20m pole, he's moving at with a (relative) velocity v such that γ = 2, he kept until reaching a 10m large house and closed the door, the house is at rest, now for the...

Can an electromagnet like this one be manipulate to attract either pole of a permanent magnet by running the current in either direction? http://www.ebay.com/itm/Metal-11LB-5kg-0-5A-Electric-Lifting-Magnet-Holding-Electromagnet-9V-DC-50N-/161550273936?pt=LH_DefaultDomain_0&hash=item259d258d90

I need to be able to support a variable side load up to a maximum of about 250lbs at 10' high. I am planning on using a 14' 4x4 steel pole that will be anchored 4ft in the ground (with concrete). Question I have will 4x4 square pole be good for this application, and would 1/4" thickness...

This is a problem from Mechanics by Kleppner and Kolenkow1. Homework Statement Two identical masses M are pivoted at each end of a massless pole of length L. The pole is held leaning against frictionless surfaces at angle θ, as shown, and then released. Find the initial acceleration of each...

Homework Statement The uniform 14-ft pole weighs 150 lbs and is supported as shown. Calculate the force P required to move the pole if the coefficient of static friction for each contact location is 0.40. (Sorry for the sideways images!) [/B] Homework Equations 1.) Fmax = μs*N 2.) ∑M = 0...

I was going through pole changing methods , when I was studying this given figure , I am quite confused in it.. in the text a1a1' & a2a2' are considered as 2 separate coils & it is assumed that both coils are carrying clockwise current , then what that "dot" & "cross" denoting?? Is it the...

Hello, I am trying to understand how to get the residue as given by wolfram : http://www.wolframalpha.com/input/?i=residue+of+e^{Sqrt[x^2+%2B+1]}%2F%28x^2+%2B+1%29^2 The issue I am facing is - since it is a second order pole, when I try to different e^{\sqrt{x^+1}} I get a \sqrt{x^+1}...

I'm wanting to add some small motors to my Beauty of old electrical and measuring things etc. thread and was curious if anyone here is familiar with Shaded Pole Motors?

Hi Guys, I am new to this forum and interested in physics/Maths. Need your help with one of the problem I am trying to solve. The problem: Someone needs to build a 51 feet tall pole (usual shape of long lamp posts, thick at the bottom and thin at the top). but they want to make this pole such...

New to the forum :) We were (trying to) discussing this at work the other day. Consider a simple battery powered circuit, with a resistor and an LED. With a battery, current is "chemically produced" in the battery and flows from the positive to the negative pole, passing through the LED...

Homework Statement A uniform pole is propped between the floor and the ceiling of a room. The height of the room is 7.80 ft, and the coefficient of static friction between the pole and the ceiling is 0.576. The coefficient of static friction between the pole and the floor is greater than that...

I have several questions about poles and towers. a. Does all of transmission towers carries three-phase powers? Is there no transmission towers designated for single-phase? b. Does all towers are for transmission purposes only? Is there any towers in the world used for distribution instead of...

Hi guys, Is it right to say that a simple pole (pole of order 1) is a removable singularity (and vice versa)?

The article below is an excerpt from Discover magazine. What I don’t understand is the difference between the geometric magnetic and the magnetic north poles. From the article the North and South magnetic poles dips are not opposite of each other, so how is the geomagnetic pole calculated? Is...

Hi everyone. While solving different contour integrals, I stumbled upon quite a few line integrals with pole(s) on contour. I've always solved them the same way, using the rule that for such lines the integrals equal \int\limits_\gamma f(z)dz=\pi i\sum\limits_n Res(f,p_n), where p_n are the...

In a polar function, $r = 1 - 2\cos(t)$ what are the tangents at the pole, considering $t$ an angle? I am not sure what the pole is BUT! $x = \cos(t) - 2\cos^2(t)$ $y = \sin(t) - \sin(2t)$ $dx/dt = -\sin(t) + 4\cos(t)\sin(t)$ $dy/dt = \cos(t) - 2\cos(2t)$ $dy/dx = \frac{\cos(t) -...

A puck of mass 'm' on friction-less ice is attached by a horizontal string of length 'l' to a very thin vertical pole of radius R. The puck is given a kick and circles around the pole with initial speed V. The string wraps around the pole, and the puck gets drawn in and eventually hits the pole...

Hello! It was some time ago on one of my visits to this forum where I saw a thought experiment about achieving faster than light communication using an impractically long pole of sorts. For example, practicality aside, if we were to construct a pole with the length of 1 light year, and have an...

Hi, I have a simple harmonic oscillation problem whose Green function is given by $$\Bigl[\frac {d^2}{dt^2}+ \omega_{0}^{2}\Bigl] G(t, t') = \delta(t-t')$$ Now I found out the Fourier transform of $G(t, t')$ to be $$G(\omega)= \frac{1}{2\pi} \frac{1}{\omega_{0}^{2}-\omega^2}$$ which has poles...

A rope is wrapped around a pole with one end attached to a large object and the other end pulled with a tension T. The rope does not slip. I am confused why the tension varies within the rope. How would I know that the static friction force is non-zero?

http://cognizantwire.net/HTMLKHSL/ELECTRON/MAGNETIC/MAGNETIC.HTM http://www.chemistry.mcmaster.ca/esam/Chapter_3/section_3.html The first image shows the electron moving in a straight line, and in the second image it's moving in circles. In both images we see the north pole is up and south...

Homework Statement Hello all. I'm currently attempting to prove the central limit theorem using a simple case of two uniformly distributed random variables. Aside from being able to solve it using convolutions, I also wish to solve it by using the Dirac Delta function. That aside, the integral...

If the axis of the Earth is tilted at 23.4 degrees away from the North Ecliptic Pole, and the Ecliptic Plane is tilted at 60.2 degrees away from the North Galactic Pole, then why is the Earth's rotational axis inclined at 27.13 degrees relative to the Galactic Equator instead of (90-(60.2+23.4))...

Hi there I would like to know about the physics involved in pole dance. for instance, why does more momentum make it easier to stay high on the pole and spin for longer? and how does this influence the effect of force on your body by gravity. Basically just the overall physics of pole dance...

Looking to build a zip line with 4% decline for the kids with: Class 2 50' CCA syp Class II telephone poles sunk 6.5ft. 3/8" cable 7x19 Galzanized cable for guy wire and zip line. 1st zip: 100ft Starting at 26ft on a 6' hill->Ending at 22ft 2nd zip: 120ft Starting at 22ft -> Ending at...

The uniform 3.6 m pole is hinged to the truck bed and released from the vertical position as the truck starts from rest with an acceleration of 0.90 m/s2. If the acceleration remains constant during the motion of the pole, calculate the angular velocity of the pole as it reaches the horizontal...

Homework Statement In the figure below, two skaters, each of mass 60 kg, approach each other along parallel paths separated by 3.4 m. They have opposite velocities of 2.1 m/s each. One skater carries one end of a long pole with negligible mass, and the second skater grabs the other end of it as...

The question is: a conducting spherical shell of radius a rotates about the z axis with angular velocity ω, in a uniform magnetic field B= B_{0}\hat{z} . Find an expression for the EMF developed between: i) the north pole and the equator (2 marks); ii) the north pole and the south pole (1...

New photo released today from NASA showing remarkable detail of a hexagon vortex ring at Saturn's North pole. http://www.space.com/24534-saturn-hexagon-vortex-nasa-cassini-photo.html Anyone see any papers explaining how the ring gets its shape?

Often I'm reading on other sites that if a 2 pole 3600RPm (synchronous speed) motor were connected so that the ratio would lower the speed to the same as a 4 pole (2X) and so on with 6 pole (3x) the output HP will remain the same. However the larger the number of poles the larger the motor and...

Homework Statement A thin uniform pole of length 30 m is pivoted at the bottom end. Calculate the most probable point of rupture on the pole as the pole falls.Homework Equations I'm really not sure how to start.The Attempt at a Solution None, our professor gave us this as a challenge problem...

[SOLVED] Complex contour integral zero while containing a pole? Homework Statement ##f(z) = \frac{1}{z^2 +2z +5} = \frac{1}{(z-z_1)(z-z_2)}##, where ##z_1= -1+2i## and ##z_2 = -1-2i##. Now, let z be parametrized as ##z(\theta)=Re^{i \theta}##, where ##\theta## can have values in the...

Homework Statement A 1.80m long pole is balanced vertically with its tip on the ground. It starts to fall and its lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground? [hint: Use conservation of energy] l=1.890m Homework...

Homework Statement An Ice skater of mass m = 70kg is initially traveling at a speed v = 4 m/s along a straight path that brings his center of mass to within a distance b = .6m of a vertical pole fixed in the ice. He reaches out with his hand as he passes the pole and hangs on so that he pulls...

Sun now has only a south magnetic pole??! This article in the popular press ["Strange Doings on the Sun", Wall Street Journal] mentions that the sun's regular oscillation in the location of its magnetic poles is now not synchronized, as it's expected to be. The sun's north magnetic pole has...

Let's say I have an unbreakable pole. Let's also say I'm in an infinite vacuum. This pole is 240,000,000 meters in length. You are at the other end of the pole. I move the pole to the right 1 meter over the course of 0.9 seconds. Does the other end of the pole move immediately? If so, does it...

I have 2 magnets , i need to know the force between them , I searched a lot , conclusion was : we need to use a dipole-dipole interaction equation , which included m, which the magnetic dipole , i searched how to calculate it , and this is what i found . m=pl where p is magnetic pole strength...

In an AC generator, the side of the coil which cuts magnetic flux link from the north pole first becomes the live wire. Is there any reason behind that or is it just a natural phenomena? Thanx in advance...

Here is a question I posed to my Facebook friends this morning while waiting on my ride to work. I thought about the answer to it myself and got a good brain workout from it! I would like to know your thoughts: You have a rigid pole that cannot bend or stretch or otherwise deform in any...

Homework Statement You stand on a spring scale at the norh pole and again at the equator. Which scale reading will be lower, and by what percent will it be lower than the higher reading? Assume g has the same value at pole and equator. I have no need for the answer to this question but...

Homework Statement Utility Pole BC is guyed by cable AB as shown. The tension in cable AB (TAB) acting at point B creates a moment about point O (MO) equal to -900i+Myj-315k lb-ft, where My is unknown. a) What is the length of the pole (LBC)? b) What is the magnitude of the tension, TAB...