HELP! A merry-go-round of diameter 18 m revolves at a rate of 8.3 rev/min. What is the velocity of a child who is seated at the outer edge of the merry-go-round?

5.5 m/s
7.8 m/s
1.2 m/s
15.6 m/s

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".

Which tool is least in predicting weather