Water is formed when two hydrogen atoms bond to an oxygen atom. the hydrogen and the oxygen in this example are different a) complexes. b) compounds. c) elements. and) mixtures.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics