What caused the decline of ancient egypt's old kingdom ?

How did german physicist werner heisenberg's uncertainty principle shake beliefs in newtonian physics?

What were some effects of the viet cong uprising

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.