When charging an object by friction,
Your
O
only the positive charges move from one object to the other.
only the negative charges move from one object to the other.
both the positive and negative charges move from one object to the other.
O
neither the positive nor negative charges move from one object to the other

My answer is opptionc, just check with anyone else

How many calories in food

Ithink it is letter b, i may be wrong but i think that is the answer

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.