Which is of the following is the best example of kinetic energy? A. A flagpole standing in a courtyard
B. A motorcycle speeding up on the highway
C. A swimmer getting ready to dive into a pool
D. A turtle sunning itself on a big rock

(50 points + brainliest!!)

B is the right answer because kinetic energy is a moving energy.

I think it's the motorcycle speeding up on the highway

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.