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

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

What is avogadro’s number, and why is it useful

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.