, Musk Lifts weights and methods martial arts—while he admits to having difficulties with his Physical fitness. “I wouldn’t exercise in any respect if I could,�?he explained. Silicon is usually a chemical element with an atomic number of 14. It's a hard, brittle crystalline solid with a blue-gray metallic lustre. https://www.quora.com/profile/Trevor-Flatcher-2/Exploring-the-High-Temperature-Performance-of-Silicon-Carbide-Special-Ceramics-https-www-macrocosmmaterial-com-news-E