Physics

Physics, 24.07.2019 10:00, bri9263

Explain why an ordinary bar magnet doesn’t rotate and align itself with earth’s magnetic field when you place it on a table.

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Chemistry, 19.07.2019 16:00, Becky81

The more coils in an electromagnet, a. the weaker the magnetic force. b. the stronger the electromagnet. c. the greater the heat produced by the electromagnet. d. the quicker the magnet will lose its magnetism when the current is turned off. if a larger current passes through the coil of wire in an electromagnet, then a. the magnetic field will be weaker. b. more domains align in the magnet. c. fewer domains align in the magnet. d. the magnetic field remains the same. when the current through an electromagnet ceases, what generally happens to the magnetic field? a. the magnetic field stays the same. b. the magnetic field eventually disappears. c. the magnetic field eventually gets stronger. d. the magnetic field eventually switches direction.

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Engineering, 25.09.2019 19:30, jaylaa04

The magnetic field of earth acts very similarly to a bar magnet. the magnetic field is created by molten iron within earth’s core. humans and animals rely on the magnetic field for navigation. describe how the magnetic field is used for navigation, and explain how it protects life on earth.

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Physics, 10.10.2019 03:20, shanicar33500

Espite the presence of the coil and the bar magnet, the compass points north. which end of the bar magnet is closer to the compass? check all of the following statements that are correct: the magnetic dipole moment of the coil is equal to the magnetic dipole moment of the compass. because not all parts of the magnet are the same distance from the compass, treating the magnet as a dipole located at the center of the magnet is an approximation. it isn't necessary to take the magnetic field of the magnet into account, since the coil is in between the magnet and the compass. at the location of the compass, the net magnetic field is equal to the magnetic field of the earth. at the location of the compass, the magnetic field due to the magnet is equal in magnitude to the magnetic field due to the coil.

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Geography, 10.10.2019 04:20, Theresab2021

Which of the following are true magnetic filings tend to align with the magnetic field earth's magnetic south pole is near its geographic north pole. the north pole of a bar magnet will attract the south pole of another bar magnet. the south poles of two bar magnets will repel each other. microscopic currents are responsible for the magnetic fields of permanent magnets. the si unit of magnetic field is the couloumb

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