In a physics lab, a 0.815-kg cart (A) moving east at 20.8 cm/s collides with a 1.16-kg cart (B) that is moving west at 42.6 cm/s. After the collision, Cart A moves west at 39.2 cm/s. Assume the system is isolated. Determine the final velocity of Cart B and the momentum after collision for cart B. Use the notation that east is the positive direction and west is the negative direction.

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?