Electromagnets can be used to lock doors. how could an engineer increase the strength of an electromagnetic lock? check all that apply

a. by increasing the current through the wire

b. by reversing the current through the electromagnet

c. by adding more coils to the electromagnet

d. by increasing the space between the coils in the electromagnet

B) as the temperature increases, the kinetic energy of the particles increases.|-/

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.