When You Blow Some Air Above the Upper Face of a Paper

question 27

Multiple Choice

When you blow some air above the upper face of a paper strip,the paper rises.This occurs because

• A) the air above the upper face of the paper moves faster, which makes the pressure higher than at the lower face.
• B) the air above the upper face of the paper moves faster, which makes the pressure lower than at the lower face.
• C) the air above the upper face of the paper moves faster but the pressure remains constant.
• D) the air above the upper face of the paper moves slower, which makes the pressure higher than at the lower face.
• E) the air above the upper face of the paper moves slower, which makes the pressure lower than at the lower face.

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