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2 years ago

Why does a magnet attract a steel nail

Physics

1 answer:

SVEN [57.7K]2 years ago

7 0

Answer:

The nail will stick to the bar magnet because it will become magnetized, and it's metal. The presence of the nearby north pole rearranges the magnetic domains inside the steel so that their south poles all point toward the north pole of the permanent magnet. As a result, the other end of the nail becomes a north pole.Magnets attract iron due to the influence of their magnetic field upon the iron. ... When exposed to the magnetic field, the atoms begin to align their electrons with the flow of the magnetic field, which makes the iron magnetized as well. This, in turn, creates an attraction between the two magnetized objects.

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2 years ago

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Answer:

$h=25.52\times10^6 m$

Explanation:

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Solution:

Potential energy at maximum height = ( Potential + Kinetic energy ) at the surface

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$- G M / ( R + h ) = - G M / R + (1/2) v^2$

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= $( (- 2\times 6.67\times10^{-11}\times6\times10^{24}) /(6.4\times10^6)} +10000^2$

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$R+h=31.92\times10^{6}$

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2 years ago

Which element has the fewest valence electrons?

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Answer

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3 years ago

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Answer:

The moment of inertia is $I=\frac{M}{12} a^{2}$

Explanation:

The moment of inertia is equal:

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If r is $-\frac{a}{2}$

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$I=\int\limits^a_b {r^{2}\frac{M}{a} } \, dr\\a=\frac{a}{2} \\b=-\frac{a}{2}$

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