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When you suck on a straw you generate low pressure, so that means the pressure outside the straw, by contrast is higher and so matter gets sucked into the straw. On the moon there is no atmosphere and so the pressure is zero. No matter how hard you try you cannot create a pressure of less than zero inside the straw and so no suction can occur.

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Q: Why will a straw not work on moon?
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Related questions

Why can't we suck a cold drink through a straw on the moon?

Sucking through a straw relies on atmospheric pressure to push the liquid up. In the airless environment of the moon, there is no atmospheric pressure to assist in the suction action, making it impossible to drink through a straw.


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Can you drink juice on the moon using a straw?

Yes. Drinking with a straw will only be easier, as there is less gravity to hold down the juice.


How do straw rockets work?

Straw rockets work by blowing air through a straw, which propels the rocket forward. The force of the air moving through the straw creates thrust, pushing the rocket in the opposite direction. The fins on the rocket help stabilize its flight path.


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Not if the dental work is wisdom teeth removal. Sucking on a straw will cause the stitches to come out and the incisions to start bleeding again.


How do you make a straw that won't work?

Sabotaging a StrawPutting one or more pinholes in the straw, above the level of the liquid, will allow air to enter the straw at the top, and the liquid will not rise in the straw. To use this "sabotaged straw", merely switch ends (flip it over) so that the pinholes go under the liquid.


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Gordon Message has written: 'Paper straw craft cards' -- subject(s): Handicraft, Straw work


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How does a straw work?

A straw works by using suction to draw liquid up into it. When you suck on the straw, you create a lower air pressure inside the straw, allowing the atmospheric pressure outside the straw to push the liquid up and into your mouth.