The notion that space and time are relative to the person measuring them was first articulated in .

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

The system of checks and balances was designed for what purpose? fear of strong state power to keep power out of one branch to appease the southern states to allow the judicial branch to have equal power

What event involving the maine motivated the united states to go to war with spain? it exploded in cuba. it was hijacked in the philippines. it exploded in panama. it was hijacked in puerto rico.