water does not appear in the equilibrium expression because it is a pure liquid. however, the addition of water to the equilibria in this lab can impact the equilibrium. why does this happen?

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Wagons/motorized vehicles

Sorry i dont understand the question can you rephase it?