How does a sound wave form

How is the gravitational force related to the distance between two objects?

If element x has 99 protons how many electrons does it have

How can you improve the percent yield of copper in this lab? check all possible strategies that will you do so. measure reactants precisely. stir to the reaction take place. chill the reactants before combining them. wait patiently until the reaction completes. make sure to recover as much copper as possible.