Which non-metal makes up diamond, graphite, and the majority of coal? a. sodium b. carbon c. oxygen d. magnesium

The correct answer is option B, that is, carbon.  

Carbon refers to a chemical element denoted by C, exhibiting atomic number 6. It is tetravalent and nonmetallic, forming four electrons accessible to produce covalent chemical bonds.

Carbon in the form of coal, which is primarily carbon is used as a fuel. Graphite is used for high-temperature crucibles, pencil tips, electrodes, dry cells, and as a lubricant. Diamonds have an application in jewelry, and as they are hard, in the industry they are utilized for drilling, cutting, polishing, and grinding.  

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.