Q:

What is normal polarity?

A:

Quick Answer

The Earth has a magnetic field and two magnetic poles. Polarity is used to describe the location of the magnetic north pole and where it is presently located geographically. Normal polarity is when the magnetic north pole is located at the geographic south pole.

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Full Answer

The Earth's magnetic poles have reversed multiple times, and predicting a reversal is highly difficult, as the reversals have no specific length or time frame. These reversals can be seen by studying rock layers, particularly those found mid-ocean, which show minerals that display normal and reversed polarity, depending on which side of the ridge the samples are taken from.

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Related Questions

  • Q:

    Which dissolves better in water, salt or baking soda?

    A:

    Table salt is more soluble in water than baking soda because of the difference in polarity, bond types and compound size. Salt, or sodium chloride, is bound by ionic bonds and is considered extremely polar. Water, or H2O, is also very polar. According to Kent Chemistry, "Like dissolves like."

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  • Q:

    Why is hexane nonpolar?

    A:

    Hexane is nonpolar because its exterior of hydrogen bonded to carbon is the same on every side, so there is no place for the slightly greater electronegativity of carbon to cause overall polarity. This is true even in the branched isomers of hexane. Hexane is a molecule composed of six carbon atoms and six hydrogen atoms in all its different configurations, with a straight chain of carbon atoms being standard.

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  • Q:

    What is the relationship between electronegativity and polarity?

    A:

    Electronegativity in atoms causally relates to polarity in molecules, as different electronegativities in different components of an asymmetrical molecule cause that molecule to be polar. However, electronegativity differences that are too great lead not to polar molecules, but to ionic bonds. Electronegativity differences also do not lead to polar molecules when they are fully symmetrical because the charges are balanced.

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  • Q:

    How can metal be permanently magnetized?

    A:

    A permanent magnet can be created by placing a piece of hard iron in a strong magnetic field generated by a machine or two or more hand-held magnets. Other methods for creating a permanently magnetized piece of metal involve using steel.

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