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

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 108CP: A wire ismade into a circular shape of radius R and pivoted along a central support.The two ends of...

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