Diagram above shows a yatch moving against the direction of the wind.
Rajah di atas menunjukkan kapal layar berlayar melawan arah angin.
What can you say about the air velocity and pressure at X?
Apakah yang boleh dinyatakan tentang halaju angin dan tekanan di X?
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Answer
C
Bernoulli's principle is an idea of fluid dynamics.It says that as speed of the fluid increases, pressure decreases.