Sentences with phrase «of magnetic north»

Whilst the various owners of the work will be geographically dispersed, the needle of every compass will be uniformly trained to the location of magnetic north, creating an invisible bridge between all its recipients.

Some animals can detect this field, which reveals the direction of magnetic north, and use it to navigate (see «Whales and terns turn together»).

If science can figure out how to move electrons across silicon, it can teach watchmakers how to tell us the temperature, the weather, the altitude, the day of the week, the direction of magnetic north, and, yes, even the time — all on the face of a single wristwatch.

A geomagnetic reversal is a change in the orientation of Earth's magnetic field such that the positions of magnetic north and magnetic south become interchanged.

During reversals, Earth's field weakens (although it does not disappear entirely), and the direction of magnetic north may vary wildly.

Not exact matches

The company has developed a machine that uses electricity to print the magnetic equivalent of pixels on a surface — complex patterns of north and south polarity points — allowing precise control over the topology of the magnetic fields.

Biologist Kenneth Lohmann of the University of North Carolina in the United States, quoted in National Geographic News, says that «It seems they inherited some sort of magnetic map.»

The world has its mysteries, and one of them is that dogs seem to know where magnetic north is, as shown by their orientation when they relieve themselves.

A compass is not made of the same substance as a magnetic field, nor is it sent or chosen by the north pole, but it is accurately sensitive to the pull and direction of the magnetic field within which we live.

Bees home in on brilliant ultraviolet patterns that we see as plain white daisies; pigeons can literally align themselves to magnetic north because of magnetite in their brains.

The earth has North and South poles because of the «Magnetic Field» generated by the its metallic molten core.

As the molten rock solidified, the minerals preserved a record of Earth's polarity, the direction its north and south magnetic poles pointed at the time.

The difference between magnetic and true north, called magnetic declination, varies slightly with time and place, reflecting shifts in the flow of the molten iron.

Which could account for our planet's weird history of magnetic field reversals, with north and south poles swapping places.

Unlike Earth, which has two magnetic poles (north and south), ice giants can have many local magnetic poles, which leading theories suggest may be due to superionic ice and ionic water in the mantle of these planets.

For example, scientists don't understand why the magnetic field is as strong as it is, or why the field reverses polarity — the North Pole becomes the South Pole and vice versa — every several hundreds of thousands of years, briefly vanishing in between.

Scientists have been taking direct measurements of the field only since 1837, but mariners have been watching magnetic north far longer.

This current fills the core and is the source of tremendous magnetism; its poles, located roughly at the ends of Earth's axis, mark magnetic north and south.

But when the sun ejects major blasts of particles in flares and solar storms, these belts overflow and send electrons streaming toward Earth along the looping lines of the magnetic field, which intersect the planet near the north and south poles.

As far as we can tell, though, nature only supplies magnetic charges, or poles, in pairs — the inseparable north and south poles of the bar magnets beloved of school science demonstrations, for example.

A quick shipboard analysis of magnetic orientations frozen in the rocks hinted that those volcanoes erupted farther north than Hawaii's current latitude, implying that the hot spot had moved south over time (Science, 11 January, p. 260).

All known magnets have both a north and south pole, as illustrated in the inset image, with lines indicating the direction of the magnetic field.

In this case, the location of this magnetic anomaly would then mark the initial location where North America split from the rest of Pangea as that ancient supercontinent broke apart.

This new study by Elias Parker Jr. of the University of Georgia examines a prominent swath of lower - than - normal magnetism — known as the Brunswick Magnetic Anomaly — that stretches from Alabama through Georgia and off shore to the North Carolina coast.

And here's something to add even more confusion to the north magnetic pole (aka dip pole) versus north geomagnetic pole (aka dipole): the magnetic pole in Earth's northern hemisphere acts like the south pole of a bar magnet.

So the north magnetic pole is where the earth's magnetic field lines pull toward the planet, acting like the south pole of a bar magnet.

«The north pole of your bar magnet is attracted to the north [magnetic] pole of the earth,» Maus adds, the reverse of the usual situation in which like poles on magnets repel one another.

From a physics standpoint, then, the north needle of a compass (or any magnet) points to what is physically — but not in name — the south magnetic pole of the earth, in other words, in the direction of the Arctic.

Correction: This article has been updated to correct the frequency with which the north and south poles of Earth's magnetic field swap places.

6 Reversal of Earth's magnetic field Every few hundred thousand years Earth's magnetic field dwindles almost to nothing for perhaps a century, then gradually reappears with the north and south poles flipped.

The direction of the magnetic field — the north / south orientation — depends on the direction of the flow of the electricity.

Los Alamos National Laboratory staff scientist Cristiano Nisoli explained, «The emergence of magnetic monopoles in spin ice systems is a particular case of what physicists call fractionalization, or deconfinement of quasi-particles that together are seen as comprising the fundamental unit of the system, in this case the north and south poles of a nanomagnet.

In the honeycomb pattern, where three magnetic poles intersect, a net charge of north or south is forced at each vertex.

Biologists Kenneth Lohmann and Larry Boles at the University of North Carolina discovered that the spiny lobster Panulirus argus, an invertebrate not celebrated for brainpower, relies on an internal magnetic compass.

Monarchs, they found, navigate north or south using the change in dip of Earth's magnetic field lines with latitude.

Travis Horton at the University of Canterbury, New Zealand, plotted the migratory tracks from each species over a detailed magnetic map of Earth, which shows how the magnetic field's inclination and declination — the angular difference between the field lines and true north — vary from point to point.

To find out how the turtles remain within the gyre, Ken Lohmann of the University of North Carolina at Chapel Hill and colleagues made hatchlings swim in the presence of magnetic fields that simulated locations off Portugal, by which the gyre passes.

And that if you heat a magnet up enough, then you have no magnet at all: High temperatures randomly jumble all the bits of magnetic material (ultimately orientations of spinning electrons) that had aligned themselves along the north - to - south - pole axis.

A better understanding of the structure of Earth's inner core would clarify its role in locking the planet's magnetic field in its north - south position, which has the effect of insulating terrestrial life from a lethal bombardment of cosmic rays.

Upon exiting the heliopause, the local measurements of the magnetic field by Voyager 1, shown here as a compass needle, differed by 40 degrees from the «true magnetic north» estimated to be the direction of the magnetic field in the pristine interstellar medium.

And NSF didn't get its wish to start construction of a polar cap observatory near the magnetic North Pole.

Therefore, the spacecraft is moving through a special region of space where magnetic fields are rotated away from true magnetic north.

The ribbon center is the direction of «true magnetic north» for the pristine interstellar magnetic field.

Every now and then the earth's magnetic field, which here points north and down, would reverse and point south and up, all due to the convection of the liquid outer core of the earth.

Based on the theory that magnetic fields affect the overall light sensitivity of birds» eyes, Heyers's best guess is that birds see north as a dark spot, with a gradient of light representing other directions.

Magnetic traces have long been used to calculate the latitudes, the north - south positions, of ancient continents.

They seem to hatch with a set of directions, which, with the help of their magnetic sense, ensures that they always stay in warm waters during their first migration around the rim of the North Atlantic.

At each of those intervals, Xi Tian, recent Penn State doctoral student and now a postdoctoral scholar at the University of North Carolina, Chapel Hill, measured and evaluated fetuses, examining them with light microscopy and magnetic resonance imaging.

«The beauty of spin ice is that the remaining degree of disorder in this low - temperature phase makes these two points independent of each other, apart from the fact that they attract each other from a magnetic point of view because one is a north and one is a south,» Castelnovo points out.

«The beauty of spin ice is that the remaining degree of disorder in this low - temperature phase makes these two points independent of each other, apart from the fact that they attract each other from a magnetic point of view because one is a north and one is a south,» Castelnovo says.