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The angle of magnetic declination on a topographic map is the angle by which a compass point varies from?
TSxS
True north. True north and magnetic are not the same, in fact magnetic north moves and over the eons has flipped between north and south in a sudden and dramatic fashion. We are able to see these shifts in the cooling of the magma in the sea floor spreading.
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Why do magnets have a north and south pole?
Because they point to the respective direction
What is the unit to measure the strength of a magnetic field?
We can say magnetic field strength is a measure of magnetic strength of a magnet.. like electric field density in electrostatics.... ex consider a current carrying wire which produce a magnetic field in radial direction... by using ampere law.. we can easily find magnetic field strength at a point (r distance from wire)... H=I/(2*3.14*r).. its like finding a electric field intensity by Guass law.......The magnetic field ranges from less than 30 micro-teslas (0.3 gauss) to 60 microteslas (0.6 gauss) The strength varies daily usually about 25 nanoteslas (nT) with variations every second of 1 nTAnswerMagnetic field strength (symbol H) is defined as the magnetomotive force per unit length of a magnetic circuit, and is expressed in amperes per metre (A/m). The original answer appears to be defining flux density(expressed in teslas), not magnetic field strength.
What type of metal can repel a magnet?
All metals can repel a magnet. The degree to which they do so is dependent on whether they are ferromagnetic, paramagnetic, or diamagnetic.A ferromagnetic metal is one which has a magnetic field regardless of whether or not they are subjected to an applied or external magnetic field. These are often called permanent magnets. The strength of their magnetic field varies depending on the strength of the external magnetic field, but has a limit outside of the external field. Iron is an example of a ferromagnetic metal.A paramagnetic metal is one which has a magnetic field only when subjected to an applied or external magnetic field. The strength of a paramagnetic metal's magnetic field tends to vary proportionally with the external magnetic field, and so these are often the strongest magnets that we see. An electromagnet is the easiest way to conceptualize the way a paramagnetic metal works. When an electromagnetic circuit is turned on, it's a magnet, when it's turned off, it's not. Tungsten is an example of a paramagnetic metal.Diamagnetism is a property of all materials, not just metals. This property is kind of hard to explain classically, so just think of it as a material's magnetic field created, when subjected to an external magnetic field, because of all of the material's electrons being pulled one way, and all of the material's protons being pushed the other way. The strength of a magnetic field from a purely diamagnetic material is farweaker than that of a paramagnetic or ferromagnetic material's magnetic field.
What is the dry season in Argentina?
it varies between April to June
What molecule inversely varies its concentration with chloride in the plasma?
bicarbonate
How is magnetic declination measured in the northern hemisphere?
It is measured exactly the same in the Southern hemisphere (no difference between the two hemispheres). It is the difference between magnetic north and true north and it varies all over the globe. Magnetic declination (also called magnetic variation) is positive when magnetic north is east of true north (clockwise) and it is negative when magnetic north is west of true north (anti-clockwise).
What is the angle between geographic north and the north to which a compass needle points?
The angle between geographic north and magnetic north, to which a compass needle points, is known as magnetic declination. It varies depending on your location on the Earth's surface and can be either east or west of true north. It is important to account for this difference when using a compass for navigation.
Is the angle between geographic north and the north to which a compass needle points?
The sum of variation and deviation. The angle of magnetic declination, or magnetic variation, is the angle between the local magnetic field lines with which a magnetic compass needle lines up and the direction of true north, the north axis point of Earth. In the U.S., that angle varies between 0 degrees and about 20 degrees and also varies over time.The difference between "true" north and "magnetic" north is called "magnetic variation", which is often abbreviated as "mag var".The north magnetic pole is in northern Canada, but is continually (although slowly) moving. Topographical or navigational maps are generally overprinted with "mag var" lines and the amount of correction.
Which is the angle between geographic north and the north to which a compass needle points?
The sum of variation and deviation. The angle of magnetic declination, or magnetic variation, is the angle between the local magnetic field lines with which a magnetic compass needle lines up and the direction of true north, the north axis point of Earth. In the U.S., that angle varies between 0 degrees and about 20 degrees and also varies over time.The difference between "true" north and "magnetic" north is called "magnetic variation", which is often abbreviated as "mag var".The north magnetic pole is in northern Canada, but is continually (although slowly) moving. Topographical or navigational maps are generally overprinted with "mag var" lines and the amount of correction.
What units of measurement is used to describe magnetic declination?
MD varies based on you location on the globe. It is measured in degrees. for example; when setting a course of 180-due south, if the MD is +7 degrees then your compass heading for true south is 187 degrees. this is because the map/geographic top of the earth is not the magnetic top center of the earth. Find someone who was in the Army. They will give you a dissertation on the topic.
Difference between true north and magnetic north?
True north refers to the geographic North Pole, the point at which the Earth's axis of rotation intersects its surface. Magnetic north, on the other hand, is the direction that a compass needle points towards, which is influenced by the Earth's magnetic field. The difference between the two is known as magnetic declination and varies based on location.
What is the difference in degrees between True North and Magnetic NOrth on the topographic map?
It varies with where you are on the earth. It all has to do with your geographic position (lat/lon) and also the magnetic activity of the area. You can acquire a USGS topographical map and it will have the magnetic variation for the area shown.
It is important to take the declination into account when you are closer to the poles?
It is important to take the declination into account when one is closer to the poles because declination varies more as a function of longitude and not the latitude. In North America, if one goes toward the east coast, the declination increases to the west. If one goes to the west coast, the declination increases to the east.
How does a magnetic needle shows north direction?
It aligns with the Earth Magnetic field. The Earth is a huge dynamo. Its center made of nickel is surrounded by molten iron and other metals this generates a complex magnetic field. It meanders. That is it varies in location. You can find a map of its' previous locations.Alternative AnswerAs the previous answer says, a compass needle will align itself with the earth's magnetic field, thus indicating 'Magnetic North'. The term 'Magnetic North' is used to differentiate this direction from 'True North', and navigators must know where Magnetic North is, relative to True North, to accurately plot a course.Bear in mind, however, that 'Magnetic North' is a direction, and NOT a magnetic polarity. The magnetic polarity of Magnetic North is actually a south pole and, since 'unlike poles attract', it attracts the north (-seeking) end of the compass needle.
What is the compass variation?
I think you're after the magnetic variation. If so :- That is the variation between true north and the earth's magnetic field at your location. Can be + or - and up to a few tens of degrees.Your compass does not actually point to north, though that is a useful assumption. In reality, the compass needle aligns itself with the direction of the earth's magnetic lines of force at your location. These do not run nicely north and south. Your map will have on it an indication of the magnetic variation in that region, and may include also the amount by which that varies annually.The earth's magnetic field is generated (most of it anyway) by electrical currents flowing in the magma. These currents may be caused by the core rotating slightly faster than the mantle and crust. [But no one's been there!] The magma and the earths core beneath it are much too hot to sustain a magnetic field.
How does compass work?
Its needle is a fine bar-magnet on a low-friction pivot to allow it to align itself with the Earth's magnetic field. Its North is therefore the Earth's magnetic, not rotational, North Pole, so a correction has to be made to the reading to establish the true geographical bearing. Since the magnetic pole slowly precesses over the years, the correction varies with time.
Why does the sun have so many magnetic fields?
The sun does not have 'so many magnetic fields.' It has 1 magnetic field that varies according to the distance from the sun.
