Which other empires influenced ancient history? what were their contributions to human civilization?

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

The people of mozambique and zimbabwe would be most likely to be affected by a change in flow of which of these rivers? a) congo b) niger c) nile d) zambezi

Choose one of these concerns and write a short paragraph about its impact on africa. what has caused this problem to occur, and how has it impacted people who live there?