Aeronautics (from the ancient Greek words á½°Î®Ï ÄÄr, which means air, and Î½Î±ÏÏÎ¹ÎºÎ® nautikÄ which means navigation, i.e. navigation into the air) is the science or art involved with the study, design, and manufacturing of air flight capable machines, and the techniques of operating aircraft and rockets within the atmosphere.
Diamond-like substitutes, including cubic zirconia, a crystalline compound synthesized from the elements ziconium and oxygen, attempt to mimic this light-dispersing property, though they fall short of diamond's brilliance and unrivaled hardness.
It is just C but it is one of the allotropes for carbon carbon have several allotropes like diamond, coalâ¦â¦. The differences is the structure of the carbon was arrange. Graphite is brittle and it can conduct electricity that classified as semi-metal.