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BigorU [14]
3 years ago
15

Which is an important step in how an electric motor uses magnetic force to produce motion?

Physics
2 answers:
lawyer [7]3 years ago
8 0

Answer:

B. As the north pole of the electromagnet nears the south pole of the permanent magnet, the current reverses and the poles of the magnets then repel.

Explanation:

Romashka [77]3 years ago
7 0
The basic idea of an electric motor is really simple: you put electricity<span> into it at one end and an </span>axle<span> (metal rod) rotates at the other end giving you the power to drive a machine of some kind. Hope this helps. Have a nice day. Feel free to ask more questions.</span>
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Without water's hydrogen bonds, which
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Answer:

A. Water would be a gas at room temperature, and

D. Ice would sink in water.

Explanation:

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Also because of hydrogen bonding, the density of ice (solid \rm H_2O) is typically greater than that of water (liquid \rm H_2O.) When compared to water in its liquid state, there are more hydrogen bondings between molecules of water in its solid state. The hydrogen bonds hold the molecules together to form a lattice. Because of this structure due to hydrogen bondings, the molecules are farther apart than they are in the liquid states. As a result, the density of ice is typically smaller than that of water. That would likely not be the case if there was no hydrogen bondings between water molecules.

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