A train takes 2h to reach station B from station A and 3h to return back to A. The distance between the station is 200km, then its average speed would be

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

How is zig zagging a form of acceleration?