dirt
Running on even surfaces is best.
if there are hole you will fall and lost your speed but on the straight surface you will get more speed
due to surface tension
The difference between surface run-off and subsurface run -off is that surface run-off is that when it is precipitation the water goes on the ground like a river and lake. The water that goes on the top of the ground is going to the oceans. The subsurface run-off is that when it is preciptation the water
No
You can't run on Jupiter, it doesn't have a solid surface for you to run on.
no surface runoff is not
The best reflector for sound will be massive, rigid, and with a smooth surface.
The surface of a Roman road was curved to make water run off.
Surface run off is water that runs over the surface of the land. Generally the soil has been infiltrated to full capacity. Channel run off is water in rivers, streams and channels.
Well, there is a water beetle which can run across the surface of a pond, for example; he is using surface tension to support him.