Rivers' surface located in deep valleys can be below of the ocean surface. Furthermore, there are underground rivers which certainly are below sea level, depending on how deep such rivers are placed below-ground.
it will bounce higher other than any surface.
In our solar system, Neptune, Jupiter and Saturn all have higher surface gravities than earth.
Yes. Any slanted surface with one end higher than the other can be considered an inclined plane.
Yes, there is some danger in the Vietnam river. The rain makes the river's water higher and that can cause a flood.
Gold can float on water if there's a layer of oil on the surface. To break the surface tension, a drop of Dawn soap will do the trick.
a river that carries more water than any other
Amazon River
Amazon River
Kongo
=The Amazon River=
Danube
Amazon