I’m about to start a science exam anyone kind enough to help?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

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? ?

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.