If the forces acting upon an object are balanced, then an object must a. be beginning to slow down. b. be accelerating. c. be moving. d. be moving at a constant velocity.

D is the answer.

There is not enough force to stop it or make it accelerate.

I have had this test before so i believe the answer to this question is

D. be moving at a constant velocity.

answer; (d) spontaneous processes are characterized by the overall conversion of order to disorder;

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.