What is chemical compound

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

The majority of australians live in the w. urban rimx. tropical northy. outbackz. sunshine coast

The caste system in india was used for what purpose? a) to ensure that all people had an adequate income b) to prevent the rich from taking too much power c) to provide social control and conformity according to one’s birth d) to draft a military capable of defending india from mongol invasion