The speed of the water is the greatest at point B
I suppose that you wanted write "uncharged". The particles without electrical charge present in the nucleus are called neutrons.
M= gpe / gh
G= gpe / mh
H=gpe / mg
Explanation:
Graph A matches description 4 because the car is coming back.
Graph B matches description 3 because the speed of the car is decreasing.
Graph C matches the description 2 because the car is traveling at a constant rate.
Graph D matches the description 1 because the car is stopped.