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The other primary ore of iron is .
—Kaolinite is a very fine, white used as a filler in many products, for coating pages in magazines and newspapers to prevent ink from running, and as a whitener and abrasive in toothpaste.

Recycledaggregates consist mainly of crushed concrete and crushedasphalt pavement.

ForceField have a , but it's not about how they believe in it - it's about how you can build a magnet-doohickey using their products that's far more powerful than far more expensive commercial units. Whatever, if anything, the commercial units do, you can do for a lot less. Fair enough.

Sadly, people seldom stop to think about them.

It rarely occursin nature as a native element, but is found in a number of different minerals.

A magnetic field is the magnetic space around the magnet. You can measure a magnetic field by the strength of the magnetism and by the direction it’s pointed.

Emerald and aquamarine are "beryl" gemstones.

Also, don't bother making a "commutator," just hook the wires directly to the bulb. It's much simpler that way, but the generator will produce AC (alternating current).

Bromine is the only liquid nonmetallic element.

There are a few things that can weaken the magnetism in a magnet, like storing it too close to heat, strong electrical currents, other magnets, or radiation. Additionally, high humidity can corrode neodymium magnets.

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It is also used in bearing metal, type metal, solder, collapsible tubes and foil, sheet and pipes, in semiconductor technology and in 4th of July fireworks.

—Coal is primarily used in the generation of electricity.

Some magnets are permanent, or always, magnetic and others are non-permanent. For example, a magnet from your refrigerator will always be magnetic. A paperclip or nail is not magnetic, but both can become non-permanent magnets when touched by a strong enough fridge magnet. Get it?

United States consumption of calcium metal is small.

Bismuth compounds are used in stomach-upset medicines (hence thetrademarked name Pepto-Bismol), treatment of stomach ulcers, soothing creams, and cosmetics.

One can reflect on the fact that every transformer uses it, too.

—Bauxite is the mineral ore of aluminum which is used in the manufacture of cans, airplanes, sporting and electronic equipment and home appliances.