I would say that in very fast moving water such as in a river, the cobble size could be transported because cobbles are 64-256mm so are quite big and in a quiescent stream won't move much but in a freshet say in a steep mountain stream they can be rolled along such as I observed in the local streams at a mining town during the Hurricane Fifi in Honduras in 1974.
Tectonic plates is a theory that the lithosphere is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
Tectonic plates float on top of the molten rock and moving around the planet. The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
Answer:
1) 4.8 gal.
2) 25 min.
Explanation:
Step 1- Multiply the constant by 3.
3×1.6= 4.8
Step 2- Divide 40 by the constant rate.
40/1.6= 25
So, the tank will fill 40 gallons after 25 minutes.
