A distance runner jogs 5.0km around a small lake. She travels the first half of the distance at a constant speed of 10 m/s. She travels the second half of the distance at a constant speed of 2.5 m/s. What is the average speed of the jogger for the entire trip.

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.