Physics
Physics
Problem
Describe qualitatively how and why the speed of water exiting a small hole in the wall of a tall open tank changes as the water level above the hole slowly decreases during drainage. Limit your response to two sentences.Intuitive explanation
As the water level drops, the pressure at the hole decreases because pressure depends on the depth of water above it (). By Torricelli's law, exit speed is proportional to , so the water flows out more slowly as the tank empties.
Intuitive explanation
As the water level drops, the pressure at the hole decreases because pressure depends on the depth of water above it (). By Torricelli's law, exit speed is proportional to , so the water flows out more slowly as the tank empties.