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A composite material is a type of artificial material. This artificial material is usually made of two different materials usually held together by cement.
Corian is the brand name for a solid surface material created by DuPont. It is composed of acrylic polymer and alumina trihydrate, a material derived from bauxite ore.
An armor-piercing composite rigid (APCR) is a type of ammunition designed to penetrate armored targets. It consists of a composite material, usually a combination of steel and tungsten or steel and other high-density materials, which provides a high level of hardness and density for improved penetration. APCR rounds are commonly used in anti-tank weapons and are effective against heavily armored vehicles.
A composite number is one that has factors besides itself and 1. 70, for example, could be 1 * 70, but also 10 * 7, 14 * 5, etc. Note: If this question is from work you have been assigned by a teacher or professor, I suggest you do the work yourself instead of trying to find the answers online. This will help you to better understand the material and become more familiar with it. Of course, if this question was not from homework, you can ignore this message.
A summary involves deletion of less important details. You would not substitute or invent new material, because a summary is supposed to convey an accurate picture of the summarized material, not a revised version.