Chemistry

Chemistry, 01.07.2019 05:00, julionavedo21

Brock brings a magnet near a metal object. a magnetic force acts on an object, pulling it upward. which of the following best describes the magnetic force? a. a force that acts at a distance b. a gravitational foce c. a frictional force d. a contact force

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Physics, 17.07.2019 03:30, emanuelmorales1515

Objects x and y are in a strong magnetic field. both objects are removed from the magnetic field, after which the magnetic domains in object x remain unchanged while the domains in object y go from being aligned to becoming random. which choice correctly describes objects x and y? object x is a temporary magnet because it retains the alignment of the domains, while object y is a permanent magnet because the domains become random. object x is a permanent magnet because it retains the alignment of the domains, while object y is a temporary magnet because the domains became random. object x is a temporary magnet because it retains the alignment of the domains, while object y is not magnetic at all because its domains are not aligned. object x is a permanent magnet because it retains the alignment of the domains, while object y is not magnetic at all because its domains are not aligned.

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Biology, 09.10.2019 01:50, dragongacha777

Brock brings a magnet near a metal object. a magnetic force acts on an object, pulling it upward. which of the following best describes the magnetic force?

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Chemistry, 05.11.2019 15:31, santisammy237

Choose the number for the word the description matches. the two ends of a magnet an object that is always magnetic the area where the magnetic force is present an object that is magnetic only when in the presence of another magnet an object with two sides that have opposite characteristics options: 1.magnetic poles 2.magnetic fields 3.dipolar 4.permanent magnet 5.temporary magnet

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Physics, 13.11.2019 18:31, mrashrafkotkaat

When a diamagnetic object is placed near one pole of a strong magnet, the object is repelled away from the pole by a magnetic force. if the magnet was held vertically and the magnetic force was strong enough, the object could levitate against the gravitational force. in 1997, researchers where able to produce a strong enough magnet that was able to levitate a small frog. they reasoned that since water is a diamagnetic material, with susceptibility x = -8.8 times 10-6, and that a frog is mostly water, the frog itself would be diamagnetic. they found that the magnetic force on the frog depended on the distance y above the magnet pole, where m is the frog's mass, the density of water rho = 1000 kg / m3, and the permeability of free space mu q = 4pi times 10-7 t m/a. the magnetic field b(y) above the magnet was measured to be, b(y) = b0e-y2/a with a = 0.00234 m2. in the experiment the frog levitate at a distance y0 = 0.0090 m above the magnet. what was the magnet's strength, b0, in their experiment? the earth's magnetic field is typically around 45 microteslas, how many times stronger is the magnet?

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