Please help with these 3 questions. 1) Find the change in heat content of the system
2) How much heat has been absorbed by the ethanol
3) How much energy is needed to heat the water

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer

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 .