A stream of smoothly flowing water arcs through the air and hits the side window of a house. At the surface of the window, right where the stream of water hits it, the water's pressure is
A) lower than atmospheric and the water's speed is faster than in the stream.
B) higher than atmospheric and the water's speed is faster than in the stream.
C) higher than atmospheric and the water's speed is slower than in the stream.
D) lower than atmospheric and the water's speed is slower than in the stream.

Question

Quizplus · Accepted Answer

According to Bernoulli's principle, when a fluid in steady flow hits a surface and spreads out, its speed decreases, and its pressure increases relative to the conditions in the stream. Therefore, at the point where the water hits the window and spreads out, its speed is slower, and its pressure is higher than atmospheric pressure.

A Stream of Smoothly Flowing Water Arcs Through the Air