When you blow some air above a paper strip, the paper rises. This is because
A) the air above the paper moves faster and the pressure is higher.
B) the air above the paper moves faster and the pressure is lower.
C) the air above the paper moves faster and the pressure remains constant.
D) the air above the paper moves slower and the pressure is higher.
E) the air above the paper moves slower and the pressure is lower.

Question

Quizplus · Accepted Answer

When air moves faster, according to Bernoulli's principle, the pressure decreases. Therefore, the air above the paper, which is moving faster than the air below the paper, causes a low-pressure zone above the paper, allowing it to rise.

When You Blow Some Air Above a Paper Strip, the Paper