30. a baseball was thrown w an initial velocity of 14 m/s at an angle above the horizontal. it remained in the air for 2 s. What following quantities were constant while the baseball was in the air?

Explain what will happen if decomposers were apsent from a forest ecoysystem.

What are two examples of phase changes that skip a phase during transition?

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.