Two incoherent sources of sound are at a distance of 20 m from each other. One emits sound at a power of 1 W while the other emits sound at a power of 2 W. If you are at a point on the line between the two sources, how far from the 1 W source must you be in order to hear both sources at the same loudness?

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. 

Ithink it’s: light bounce if off a mirror

Not sure but i think it's b.