clau asked in Science & MathematicsPhysics · 2 years ago

Fluid Dynamics?!?

The longer a straw, the harder it is to drink from. If the air pressure is 91200 Pa, and if you could create a perfect vacuum in your mouth, what is the maximum length of a straw that you could still drink from? Density of water: 1000kg/m^3. Ignore capillary effects.

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1 Answer

  • NCS
    Lv 7
    2 years ago
    Favorite Answer

    So the "head" from the straw would have to equal the given pressure:

    ρgh = P

    1000kg/m³ * 9.8m/s² * h = 91200 N/m²


    h = 9.31 m

    Hope this helps!

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