Question: Question 1 : What are composite materials? What is the advantage of using a composite material? List three examples of composite materials. Question 2 :

Question 1: What are composite materials? What is the advantage of using a composite material? List three examples of composite materials.
Question 2: What is hardness test? What are the different types of hardness tests? List all the relevant differences among them.
Question 3: In sand casting, what is the difference between a pattern and a core?
Please answer all questions 100% correctly and no plegirism or Ai. I need typed solution and well explained.

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