Al medir la velocidad de la luz a traves de ciettos medios se encuentra un valor de 1,6 X10⁸m/s¿Cual es el indice de refraccion de ese medio?

Apossible long term health effects of stress would be work

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. 

Dust and gases contract.

Answer (a)/// semi tractor trailer truck