As a transverse wave travels through a medium it displaces the particles

a. perpendicular to the motion of the wave

b. vertically along the same plane as the wave

c. parallel to the direction of the wave motion

d. horizontally along the plane that the wave travels

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

c. newton's third law of motion