At this lecture Oersted happened to place the conducting wire over and parallel to a magnetic needle.

At short distances, the exchange interaction is much stronger than the dipole-dipole magnetic interaction.

At Jupiter, the outboard ( 11 m ) set of sensors could measure magnetic field strengths in the range from ± 32 to ± 512 nT, while the inboard ( 6. 7 m ) set was active in the range from ± 512 to ± 16, 384 nT.

At high currents, iron core inductors also show gradual departure from ideal behavior due to nonlinearity caused by magnetic saturation.

At least two fundamental non-terrestrial energy sources have been proposed: solar-powered energy generation ( unhampered by clouds ), either directly by solar cells or indirectly by focusing solar radiation on boilers which produce steam to drive generators ; and electrodynamic tethers which generate electricity from the powerful magnetic fields of some planets ( Jupiter has a very powerful magnetic field ).

At Earth and all the other planets with intrinsic magnetic fields, some solar wind plasma succeeds in entering and becoming trapped within the magnetosphere.

At low latitudes, the magnetic field lines are pushed inward.

At high latitudes, the magnetic field lines are push backwards and over the polar regions.

At Earth's orbit its typical density is 6 ions / cm < SUP > 3 </ SUP > ( variable, as is the velocity ), and it contains a variable interplanetary magnetic field ( IMF ) of ( typically ) 2 – 5 nT.

At times this energy is released and the magnetic field becomes temporarily more dipole-like.

At the same time, it weakens the magnetic field in its interior.

At the Jülich Institute of Neurosciences and Biophysics, the world's largest PET / MRI device began operation in April 2009: a 9. 4-tesla magnetic resonance tomograph ( MRT ) combined with a positron emission tomograph ( PET ).

At geomagnetic field strengths typical of the central United States, central Europe or Australia, these initial electrons spiral around the magnetic field lines in a circle with a typical radius of about 85 metres ( about 280 feet ).

At a cost of $ 62. 8 million, the 19-month mission was put into a low polar orbit of the Moon, accomplishing mapping of surface composition and possible polar ice deposits, measurements of magnetic and gravity fields, and study of lunar outgassing events.

At the time, it was unclear if disks would replace magnetic memory drums, nor was it clear at the time whether fixed or removable disks would become the more prevalent.

At least 3 different operating principles are used to make electric motors: magnetic, electrostatic and piezoelectric.

At the end of those months he had invented the basics of magnetic core memory and demonstrated that it was likely to be feasible.

At the time it was not known whether the Moon had a magnetic field or not.

At a distance halfway to the moon, a magnetar could strip information from the magnetic stripes of all credit cards on Earth.

At any location, the Earth's magnetic field can be represented by a three-dimensional vector ( see figure ).

At this time Olle Karlqvist discover a magnetic phenomenon, which has been called Karlqvist gap.

At first, a single SQUID detector was used to successively measure the magnetic field at a number of points around the subject ’ s head.

At the same time, this is the deepest man-made dip in Germany.

At most boundaries, Paleozoic through Early Tertiary units dip steeply into the basins off uplifted blocks cored by Precambrian rocks.

At the higher elevations and at night, especially in winter, temperatures dip into the 40's or high 30's.

At the beginning of the ride, participants traditionally dip the rear wheels of their bikes in either the Missouri River or the Big Sioux River ( depending on the starting point of the ride ).

At the end, the riders dip the front wheels in the Mississippi River.

At the opening ceremony Rose, the US flag bearer, refused ( supported by a majority of his mostly Irish-descended US teammates ) to dip the flag to the royal box, as other countries did.

At last, Annie pushes a bowl of dip in his face and throws him out of the house, and peace between her and Henry is restored.

At Market Street, the subway will dip below the Market Street Subway and there will be another underground station serving Market Street and Union Square underneath Stockton Street.

According to Salon, there was an evident dip in critical year 2003 ( when the lead in the drinking water peaked ), in the data present in the CDC files, there were test results for children in 2002, only children in 2003, and children in 2004, At the time, Mary Jean Brown had questioned the dip, and had gotten the answer that it was due to a private laboratory not having reported the low values they had found.

At the end of the meal, finish off the solids in the dip and drink the soup from the douhua.

At an equinox, the Sun is at one of two opposite points on the celestial sphere where the celestial equator ( i. e. declination 0 ) and ecliptic intersect.

At the onset of the Neoproterozoic the supercontinent Rodinia, which had assembled during the late Mesoproterozoic, straddled the equator.

At the high end of estimates for the rotation velocity for Vega is along the equator ( for a rotation period of about 12. 5 hours ), which is 87. 6 % of the speed that would cause the star to start breaking up from centrifugal effects.

At the poles, the troposphere is thinner and the temperature only decreases to-45 ° C, while at the equator the temperature at the top of the troposphere can reach-75 ° C.

At surface level, the sinking air diverges again with some moving back to the equator and completing the vertical cycle.

At their intersections with the celestial sphere, these form the celestial equator, the celestial poles and the ecliptic, respectively.

* At the equator objects on the celestial poles stay at fixed points on the horizon.

At the equator, under flat conditions ( no obstructions such as mountains ; or at a height above any such obstructions ), the terminator line moves at approximately 1600 kilometers per hour ( 1000 miles per hour ).

At almost 7, 000 feet above sea level and almost exactly halfway between the equator and north pole, West Yellowstone experiences a subarctic climate ( Köppen climate classification Dfc ) with cold, sometimes bitterly cold winters, and brief but generally warm summers.

At the equator this delay between fixes was several hours ; at mid-latitudes the delay decreased to an hour or two.

At the equator the two celestial poles are at the horizon and motion is counterclockwise ( i. e. to the left ) around the North Star and clockwise ( i. e. to the right ) around the southern celestial pole.

At the Earth's equator this circle vanishes to a single point – the celestial pole itself – which lies on the horizon, and there are therefore effectively no circumpolar stars at all.

At Oxford he extended the Cape observations of stars to the 7th magnitude from 25 ° S declination to the equator, and collected the results in the Radcliffe catalogue for 1890, which contains the places of 6, 424 stars.

At the equator, the effective gravitational acceleration is 9. 7805 m / s².

At geodetic latitude 48. 46791 … degrees ( e. g., Lèves, Alsace, France ), the radius R is 20000 / π ≈ 6, 366. 1977 …, namely the radius of a perfect sphere for which the meridian arc length from the equator to the North Pole is exactly 10000 km, the originally proposed definition of the meter.

At a declination of-29. 6 °, Fomalhaut is located south of the celestial equator, and hence is best viewed from the Southern Hemisphere.

( At the poles, though, the celestial equator would be parallel to the horizon.

) At all latitudes the celestial equator appears perfectly straight because the observer is only finitely far from the plane of the celestial equator but infinitely far from the celestial equator itself.

At the pole, the temperature may be above 20, 000 K, while the equator is at or below 10, 000 K. The average temperature of the star is about 15, 000 K. The high polar temperatures are generating a fast polar wind that is ejecting matter from the star, creating a polar envelope of hot gas and plasma.

At solar maximum, the Sun's magnetic field lines are the most distorted due to the magnetic field on the solar equator rotating at a slightly faster pace than at the solar poles.

At the equator, there is very little difference ( Pisces, Aries, Virgo and Libra take slightly less time than the other signs ) but as one moves from the equator, larger and larger differences emerge.