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1a. Spheroidite steel is a good example of Metal Matrix Composite material. What are the matrix...

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Mechanical Engineering

1a. Spheroidite steel is a good example of Metal MatrixComposite material. What are the matrix material and the dispersedphase acting as a reinforcing agent?

1b. Name one material that is commonly used as the fibers infiber reinforced composites.

2a. In metals increasing “imperfections” e.g. grain boundaries,dislocations, vacancies in the material will increase or decreasethe resistivity of that material? Briefly explain why.

2b. Does the resistivity of a copper increase or decrease whenit is heated to a higher temperature? Briefly states why.

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