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Question:

Aluminum...and planes?

aluminum is used to make planes, cast iron is used to make heavy mashines. what is the comparisonof teh densities of aluminum and cast iron?

Answer:

The density of aluminum is MUCH lower than cast iron (thus, aluminum is LIGHTER). Because it is lighter, it would be much more ideal for applications like plane building, which is why aluminum is used over cast iron in airplanes. As well, aluminum has a protective coating called aluminum oxide which protects it from corroding in water. [Answer: see above]

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