What charges must the particles have to create the electric field shown? O A. X is positive and Y is negative.
O B. X and Y are both positive.
O C. X and Y are both negative.
O D. X is negative and Y is positive.

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy