Pls help me i dont understand and i need a very very good grade

Describe the path of the electric current through a circuit?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.