Kinematics is the study of the motion of a system of bodies without directly considering the forces or potential fields affecting the motion. In other words, kinematics examines how momentum and energy are shared among interacting bodies.
The power equals energy divided by the time
P=E/t
P=1200/60
P=20W
Hope you get it!
They don't lose OR gain electrons as they've already achieved the octet rule and have 8 valence electronsn