In which type of collision is the kinetic energy of the system unchanged? A. Perfectly inelastic
O B. Elastic
C. No type of collision
D. Inelastic

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.