If Zephyr stands on the edge of a cliff facing the wind, which direction will their umbrella turn if they open it in front of them? Make your response very short.
The umbrella will turn inside out, facing Zephyr. When they open the umbrella, the front part catches the wind like a sail. Air pressure builds up on the outside of the umbrella and is higher than the air pressure behind Zephyr, on the inside of the umbrella. This difference in air pressure pushes the umbrella to invert towards Zephyr.