Suppose that the magnetic dipole moment of Earth is 7.9 x 1025 J/T. (a) If the origin of this magnetism were a magnetized iron sphereat the center of Earth, what would be its radius? (b) What fraction of the volume of Earth would such a sphere occupy? The radius ofEarth is 6.37 x 10° m. Assume complete alignment of the dipoles. The density of Earth's inner core is 14 g/cm?. The magnetic dipolemoment of an iron atom is 2.1x 10-23 J/T. Iron has a molar mass of 55.9 g/mol. (Note: Earth's inner core is in fact thought to be in bothliquid and solid forms and partly iron, but a permanent magnet as the source of Earth's magnetism has been ruled out by severalconsiderations. For one, the temperature is certainly above the Curie point.)(a) Number iUnits(b) NumberiUnits

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Suppose that the magnetic dipole moment of Earth is 7.9 x 1025 J/T. (a) If the origin of this magnetism were a magnetized iron sphere at the center of Earth, what would be its radius? (b) What fraction of the volume of Earth would such a sphere occupy? The radius of Earth is 6.37 x 10° m. Assume complete alignment of the dipoles. The density of Earth's inner core is 14 g/cmº. The magnetic dipole moment of an iron atom is 2.1 x 10-23 J/T. Iron has a molar mass of 55.9 g/mol. (Note: Earth's inner core is in fact thought to be in both liquid and solid forms and partly iron, but a permanent magnet as the source of Earth's magnetism has been ruled out by several considerations. For one, the temperature is certainly above the Curie point.) (a) Number Units (b) Number Units

Suppose that the magnetic dipole moment of Earth is 7.9 x 1025 J/T. (a) If the origin of this magnetism were a magnetized iron sphere at the center of Earth, what would be its radius? (b) What fraction of the volume of Earth would such a sphere occupy? The radius of Earth is 6.37 x 10° m. Assume complete alignment of the dipoles. The density of Earth's inner core is 14 g/cmº. The magnetic dipole moment of an iron atom is 2.1 x 10-23 J/T. Iron has a molar mass of 55.9 g/mol. (Note: Earth's inner core is in fact thought to be in both liquid and solid forms and partly iron, but a permanent magnet as the source of Earth's magnetism has been ruled out by several considerations. For one, the temperature is certainly above the Curie point.) (a) Number Units (b) Number Units

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter31: Gauss’s Law For Magnetism And Ampère’s Law

Section31.2: Gauss’s Law For Magnetism

Problem 31.2CE

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

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Suppose that the magnetic dipole moment of Earth is 7.9 x 1025 J/T. (a) If the origin of this magnetism were a magnetized iron sphere
at the center of Earth, what would be its radius? (b) What fraction of the volume of Earth would such a sphere occupy? The radius of
Earth is 6.37 x 10° m. Assume complete alignment of the dipoles. The density of Earth's inner core is 14 g/cm?. The magnetic dipole
moment of an iron atom is 2.1x 10-23 J/T. Iron has a molar mass of 55.9 g/mol. (Note: Earth's inner core is in fact thought to be in both
liquid and solid forms and partly iron, but a permanent magnet as the source of Earth's magnetism has been ruled out by several
considerations. For one, the temperature is certainly above the Curie point.)
(a) Number i
Units
(b) Number
i
Units

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