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Ch. 6 - Lipids, Membranes, and the First Cells
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All textbooksFreeman 8th EditionCh. 6 - Lipids, Membranes, and the First CellsProblem 1

Chapter 6, Problem 1

What is a fiber composite? How do cellular fiber composites resemble reinforced concrete?

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Welcome back. Here's our next problem. Which of the following is the primary function of the fiber in a composite. Well, we can recall that. A composite is made by combining two or more materials and the purpose is to produce structural properties not present and the individual components. So an example of this would be producing a material that has greater strength and rigidity than found in any of the separate components while being as light as possible. So when we think about that and we're looking for in this question, the primary function of the fiber? Well the composite with fiber would consist of a fiber held in place, buy a resin matrix and in this mode the fiber um If you can imagine the resin is going to sort of hold it all together. The fiber gives a greater tensile strength and rigidity to the final material. So let's look through our answer choices here. Choice A says aesthetic purposes. Well the fiber has that's not the primary function of the fiber. The primary function is that strength and rigidity. So aesthetic purposes would not be a good choice here. Choice B says enhanced tensile strength as we saw. Yes that is a primary purpose of the fiber. In a composite. Just to be thorough. We'll look through other answer choices. Choice C avoid rust. Well that wouldn't be the primary function of fiber. Um Rust is just a function of whether the composite is metallic or not. So that isn't why you'd use fiber. So choice C. Not the correct answer becomes the primary function of fiber and choice d keep the composite away from termites. Again, not the best answer. Choice termites to keep them away, you do something like a chemical treatment of the composite, um not using fiber, which itself might be cellulose and prone to termite damage. So again, we look at what is the fall? Which of the following is the primary function of the fiber and composite. The answer is B enhanced tensile strength. See you in the next video.
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