Models change to accommodate new discoveries.
Answer:proton as they bear positive charge and located at the nucleus
Guess I recommend doing that
To solve this problem we will apply the concepts related to the kinematic equations of linear motion. Where speed is described as the distance traveled in a given time, and the successive equivalences that can be made under that equation.
The distance traveled by the girl with in the given time is
The distance covered by the boy with in the given time is
Since the boy will travels with twice the speed of the girl
Half way between the two rafts at the beginnings is
The final distance between the two rafts at the instant the boy reached the central point of the line joining between them is
Therefore the distance that there is between the two rafts when the first one reaches the toy is 10.5m