Alight ray is traveling from medium a to medium b. as it enters medium b, it bends toward the normal. what can you say about the speed of light in the medium?

If steel is more dense that lake water, why can a boat float

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.