26. The behavior of compounds during certain conditions that produce a series of events that Change its composition instó a new compound is called a A Physical reaction
B. Chemical reaction
C. Physical breakdown
D. Chemical breakdown

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 main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !

When china's civil war resumed, the nationalists held an advantage because the nationalist had more soldiers  than the communist.

Where? we need more.