What are the seven wonders of the world?

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 health care system in is referred to as a singleminus−payer health care system, and is a system in which the government provides national health insurance to all residents.

Did separate black churches make african americans in the north more free or less free?