1 Rank some of the moving people and things at the skating rink in
order of increasing speed.
2 How do you use changes of speed in
your favorite sport?

This is a mixture that has the same composition throughout.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which statement would indicate the presence of an acid