How does the federal judicial system promote the constitutional principle of rule of law

Who is the executive branch checking when the president calls a special session of congress

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?

How were the economies of the northern and southern states different? how ere they the same? what factors led them to develop differently?