Why are scientists concerned about the depletion of ozone in the stratosphere? 2. What is causing the depletion of ozone in the strogosphere? 3. Explain how this situation was nearly an example of the Tragedy of the Commons 4. How was catastrophe prevented ?

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 .

The answer is 1.82 j/g°c                  

Cause its being chemically applied?