The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. It is called the True North Pole to distinguish from the Magnetic North Pole.
The North Pole is the northernmost point on the Earth, lying diametrically opposite the South Pole. It defines geodetic latitude 90° North, as well as the direction of true north. At the North Pole all directions point south; all lines of longitude converge there, so its longitude can be defined as any degree value. Along tight latitude circles, counterclockwise is east and clockwise is west. The North Pole is at the center of the Northern Hemisphere. The nearest land is usually said to be Kaffeklubben Island, off the northern coast of Greenland about 700 km (430 mi) away, though some perhaps semi-permanent gravel banks lie slightly closer. The nearest permanently inhabited place is Alert in the Qikiqtaaluk Region, Nunavut, Canada, which is located 817 km (508 mi) from the Pole.
While the South Pole lies on a continental land mass, the North Pole is located in the middle of the Arctic Ocean amid waters that are almost permanently covered with constantly shifting sea ice. The sea depth at the North Pole has been measured at 4,261 m (13,980 ft) by the Russian Mir submersible in 2007 and at 4,087 m (13,409 ft) by USS Nautilus in 1958. This makes it impractical to construct a permanent station at the North Pole (unlike the South Pole). However, the Soviet Union, and later Russia, constructed a number of manned drifting stations on a generally annual basis since 1937, some of which have passed over or very close to the Pole. Since 2002, the Russians have also annually established a base, Barneo, close to the Pole. This operates for a few weeks during early spring. Studies in the 2000s predicted that the North Pole may become seasonally ice-free because of Arctic ice shrinkage, with timescales varying from 2016 to the late 21st century or later.
Attempts to reach the North Pole began in the late 19th century, with the record for "Farthest North" being surpassed on numerous occasions. The first undisputed expedition to reach the North Pole was that of the airship Norge, which overflew the area in 1926 with 16 men on board, including expedition leader Roald Amundsen. Three prior expeditions – led by Frederick Cook (1908, land), Robert Peary (1909, land) and Richard E. Byrd (1926, aerial) – were once also accepted as having reached the Pole. However, in each case later analysis of expedition data has cast doubt upon the accuracy of their claims.
Hello again everyone,
I'm in the process of winding/sourcing out coils to produce induced flux of one or the other pole orientation. I understand that when a coil is induced by a permanent magnet the resulting force will be opposite and equal to the force that caused it. So if one induces...
Homework Statement
A ski pole is bent(plastic deformation) in three point bending by applying a load 2F perpendicularly to the ski pole. The forces at the end points are of magnitude F. If the pole yields due to plastic deformation at the mid point longitudinal span of the ski pole which is...
Hi there,
I've been given this task to recognize the different types of power poles and their electrical equipments. The images are in the following link. I have encircled the equipments and components that are needed to be NAMED.
http://www.geocities.com/flabberguest_gabcraft/powerpoles.JPG...
Recently I read a research about Polar wins saying that million of kilos of our atmosphere (Hydrogen, Helium and Oxygen) left the planet via North Pole. May be possible to build a hot hydrogen balloon to leave the planet via North Polo Win??
Homework Statement
i have a question that involves geographic coordinates of a city and magnetic data here it is:
compare geomagnetic and geographic latitude to determine whether a city is closer to geographic of geemagnetic pole. the geographic coordinates are 75.55W and 45.40N. the...
Homework Statement
A jet plane flies due south over the north pole with a constant speed of 500 mph. Determine the angle between a plumb line hanging freely in the plane and the radius vector from the center of the Earth to the plane above the north pole.
Hint, assume that the Earth's angular...
Homework Statement
Ricky Bobby hangs a deer from a uniform horizontal pole as shown below. The Deer's mass is 57.6 kg, the pole has a mass of 12.1kg, and the length of the pole is 5.36m. The Deer is hung 1.92m from the point where the pole is attached to the verticle beam, and the angle of the...
Homework Statement
Consider the radius of the Earth to be 6.38×106 m. What is the magnitude of the centripetal acceleration experienced by a person (a) at the equator and (b) at the North Pole due to the Earth's rotation?
Homework Equations
a = V^2 / r
The Attempt at a Solution
I...
Homework Statement
A firefighter whose weight is 812 N is sliding down a vertical pole, her speed increasing at the rate of 1.45 m/s2. Gravity and friction are the two significant forces acting on her. What is the magnitude of the frictional force?
Homework Equations
Fk = ukFn
uk =...
The alarm at a fire station rings and a 96.0-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 3.55 m). Just before landing, his speed is 1.79 m/s. What is the magnitude of the kinetic frictional force exerted on the fireman as he slides down the pole...
Hi! This is my first post here. If I make any mistake, please tell me.
I have a question: if I want to find a pole of a polynomial, ex: " a*s^2+b*s+c ", a,b,and c are constant given. I just use simple command: roots([a, b,c]), I can get the answer.
However, if now I meet a situation is...
As I was reading Fabric of the Cosmos, I got stumped at the relativity of simultaneity section. This led me to Google for some additional explanation. I stumbled upon http://www.phys.unsw.edu.au/einsteinlight/jw/module4_pole_paradox.htm" which made me think of this question regarding the pole...
Hello everyone,
I just read that in a loop of wire if the current is anticlockwise that part is a north pole. I'm just wandering what do they mean by this. I thought only magnets have north poles. Any help would be appreciated. Thanks :smile:
Which compass pole points to Earth's magnetic North pole?
1.depends where compass is located
2. compass doesn't actually point at Earth's magnetic north pole
3. north
4. south
I'm stumped by this question. I think either 2 or 3 is the right answer, because they both seem correct to me.
I'm attempting to get a rough estimate on how the shape of an electromagnet pole will affect the field produced. Most of the poles you see in labs are tapered, and not simply cylindrical - I'm wondering how this affects the field. After all, there has to be a reason why they would do such a...
There's a principle that the electric field is stronger/more intense at the most pointed parts of a charged, non-uniform conductor.
Does this principle also apply to magnets? I.e. if we have a non-uniform magnet, is the magnetism density (sorry for the lack of a more scientific word) greater...
Hi
Suppose a closed feedback system has the transfer function
\frac{C(s)}{R(s)} = \frac{G(s)}{1 + G(s)H(s)}
In order to employ Nyquist's method to judge the stability of the system, I consider the loop gain
L(s) = G(s)H(s)
and map the s-plane contour into the L(s) plane. But what if there...
Consider a discrete-time LTI system with transfer function
H(z) =(1-3z^-1) / ( 2-z^-1)
(a) Sketch the pole-zero plot of H(z).
(b) Suppose the system is stable. Determine all possible regions of convergence (ROC) for H(z) under this condition, or state that none exists.
(c) Repeat part (b)...
Okay, 3 problems I can't seem to get the right answer for..
1. A 2.30-m-long pole is balanced vertically on its tip. 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.]
GPE...
Occasionally I need to undrstand electric fields and I usually find an equation that allows me to solve my problem without understanding the solution. Dangerous but... Anyway I've encountered another field problem and now I'd like to understand the solution to the problem.
Put in general...
why the aurora happens only in northern pole,why not in south pole...if it is because of the electrons of solar wind and Earth's magnetosphere then the same solar wind also got protons then why no aurora in south pole?
I want to know the x,y position at the time t of this system when I apply a force in the direction showed, how do I find it?
http://img152.imageshack.us/img152/7937/systemfr8.gif
Hi,
I'm working on a UHV STM. Recently I opened the multigain switch to set higher gains and I also changed the bandwidth.
In the manual I read that the bandfilter is a so called 'single pole filter' and has a 6dB/Octave roll off.
Can someone help me to understand what a single pole...
My teacher asked a very interesting question. so given a runge function 1/(1+x^2) and i interpolate it on uniformly spaced point in the inteval -1 and 1 by p_n(x)
How does the pole -i and i contribute to the oscillation of p_n(x)? I never thought pole would come into play.
I read a couple of tutorials on electromagnetism and solenoids but there's a good few questions left unanswered.
1.) What determines the poles of a solenoid electromagnet? Let's say I have direct current flowing from the left end of the coil to the right. Will the north pole automatically be...
A tether ball leans against the post to which it is attached (Fig. 5-40). If the string to which the ball is attached is 2.00 m long, the ball has a radius of 0.300 m, and the ball has a mass of 0.400 kg, what are the tension in the rope and the force the pole exerts on the ball? Neglect any...
Homework Statement
Q. Use residues and the contour shown (where R > 1) to establish the integration formula
\int^{\infty}_{0} \frac{dx}{x^3+1} = \frac{2\pi}{3 \sqrt{3}}
The given contour is a segment of an arc which goes from R (on the x-axis) to Rexp(i*2*pi/3)
Homework Equations...
Hi,
I have an electrically-actuated shutter that can be either in the "closed" or "open" positions. I want to use optoelectronic switches (slotted switches with an infrared LED source and photodiode detector) at either end that will detect whether the shutter is closed or open. The opto...
How exactly would one go about proving that
\frac{1}{1-2^{1-z}} has a simple pole at z=1?
I've tried writing 2^{1-z} in terms of e to get a Taylor series for the denominator but can't quite figure out where to go from there.
this thread is about the 1 light year long pole question, the thread was closed...
the question was " if there was a pole that is 1 light year long...person A at one side and person B at another" if person A pushes the pole, does person B see it instanteously...
most people said that it...
A pole one light year long...
laying in bed last night I had this question pop into my pointy little head.
If I had a pole one light year long sitting between points A and B and I pushed it forward one foot from point A toward point B how long would it take to move at point B?
I've...
One quick question about forces i have. Would an appear appear to weigh heavier at the equator or at the north pole? I assume both places would have have the same weight. A little feedback would be appreciated
Homework Statement
Explain how you would determine which was the north pole of a bar magnet, without using any other magnet.
Homework Equations
none
The Attempt at a Solution
If it's small enough you might be able to make it into a compass like object but if its heavy than the...
The pole in a lake!
There is a pole in a lake. One-half of the pole is in the ground, another one-third of it is covered by water, and 12 ft is out of the water. What is the total length of the pole in 'ft'?:bugeye:
Hello,
I am trying to analyze the following situation:
A tetherball is kicked with velocity of v meters per second at time t=0 seconds. The length of the string attaching the tetherball to the pole is l meters. The radius of the pole is r. Assume no gravity and no air resistance so that the...
What happens when you do a KVL through and current source?
A formula I can not understand
ns=120*f/p
f=frequency P=number of poles …..
How shall you know how many poles you got?, my old teacher just wrote it down as it would be obvious. But I think ti is related to what kind of...
A tether ball leans against the post to which it is attached. The string is attached to the ball such that a line along the string passes through the center of the ball. The string to which the ball is attached has length 1.50 m and the ball's radius is 0.105 m and has a mass of 0.266 kg ...
A firefighter with a weight of 712 N slides down a vertical pole with an acceleration of 3.00 m/s^2, directed downward. What are the magnitudes and directions of the vertical forces (a) on the firefighter from the pole and (b) on the pole from the firefighter?? I think the magnitudes would be...
I hope some of you will be able to help me.
First, let me make sure I have this right. From what I understand, the five Pole Stars are:
Polaris
Al Deramin
Deneb
Vega
Thuban
My question is, what was the Pole Star between 9,000 BC and 10,000 BC? The length of time for each Pole Star...
Here I must evaluate
\frac{1}{2\pi i}\int_C \frac{f(\zeta)}{w(\zeta)}\frac{w(\zeta)-w(z)}{\zeta -z}d\zeta
where f is holomorphic on the hole complex plane, where w(z) is a polynomial of degree n with all of its zeroes distinct (i.e. all n have multiplicity 1), and where C is a closed curve...
I want you to help me settle an arguement. Is it possible to have a center-pole magnet? That is, a magnet with one pole at the center, and the other pole facing out in every direction? I think that it isn't, because the molecules would force each other to all face the same direcion, or all of...
a)Compute hte radial accleration of a point at the equator of the earth. b)repeat for the north pole of hte earth. Take the radius of the eartk to be 6370 km.
so for a) i got 9.9337 m/s square which is right
but for b) the answer is just zero
why?
Hi,
Does anyone know a straightforward way to calculate a residue at at a pole of non-integer order. I'm trying to find the residue of \frac {e^{ipx}}{(p - i \kappa)^\eta} at p = i \kappa where \eta is a positive non-integer. Thanks.
I have reason to suspect it's zero, but I'd need...
If you have a pole, short or long, and you push it, doesn't the opposite end of the pole begin to move faster than the time the speed of light would take to travel the distance of the pole?
Assuming there is very little (none if possible?) compression in the pole, and it was floating in...