did you know that Ancient metalworkers in East Africa knew the secrets of strengthening their iron. They knew that if they melted their iron in a furnace fired with coal, then when it cooled and solidified it would be harder than the original iron. What really happened inside the hot furnace? Coal is a form of carbon, so when its heat melted the iron, tiny particles of carbon dissolved into the liquid iron. This formed a solution. When the mixture of carbon and iron cooled and solidified, it was much harder than the original iron. Since it was harder, it was much more useful for building things like tools and weapons. This solution of carbon dissolved in iron is called steel. Every time you use a tool made out of steel, you are benefiting from the discoveries of those ancient metalworkers from long ago.
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English, 21.06.2019 15:00
Why would the following likely fail as the basis for an evaluation argument? “the theme of gender bias among adults is an important one.” a. it is based on a moral judgment that not everyone shares. b. it is based on the writers personal tastes. c. it is based on a faulty assumption. d. none of the above.
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English, 21.06.2019 23:30
Determine the meaning of the word *propel* using the context clues in the sentence. wind power is the ability to capture the wind in a way to *propel* the blades of wind turbines. a) to move slowly b) to urge onward c) to stop from moving d) to drive, or cause to move, forward
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English, 22.06.2019 07:20
Which of the following best describes how the majority of content decisions are made by the media?
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did you know that Ancient metalworkers in East Africa knew the secrets of strengthening their iron....
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