Explain what happened to phineas gage and what important he had to the study of the brain

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Which represents a negative impact of technology

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers