Hail stones do a lot of damage when they fall to the Earth and hit homes and cars with great force. They hit with great force because they

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. 

Ibelieve the answer is d. macula  hope my answer has you : )

The fertilized egg  begins to develop into a hollow ball of cells called the blastocyst. 

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion