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Does a Longer Straw Make Liquid Flow Faster? The Science Explained! #science #facts #tech #shorts

• Future Lens Pi 3일 전 2026.11.09 18:31 인기
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@FuturelensPi 　3일 전

Does a longer straw make liquid flow faster? The answer depends on more than just the straw’s length! ?

When liquid flows through a straw, gravity creates a pressure difference between the liquid surface and the outlet. This pressure difference drives the liquid forward. The greater the vertical height difference, the greater the potential flow speed, as explained by Torricelli’s law.

However, a longer straw also creates more friction inside the tube, which can reduce the flow rate. The straw’s diameter and the liquid’s properties matter too.

So, the interesting part is that more height can increase the flow speed, while more tube resistance can slow it down.

What do you think: would a wider straw make the liquid flow faster?

2026-11-09 18:35

[ytcid:UgzQhleEAuJcmiNj8Nl4AaABAg] Does a longer straw make liquid flow faster? The answer depends on more than just the straw’s length! ? When liquid flows through a straw, gravity creates a pressure difference between the liquid surface and the outlet. This pressure difference drives the liquid forward. The greater the vertical height difference, the greater the potential flow speed, as explained by Torricelli’s law. However, a longer straw also creates more friction inside the tube, which can reduce the flow rate. The straw’s diameter and the liquid’s properties matter too. So, the interesting part is that more height can increase the flow speed, while more tube resistance can slow it down. What do you think: would a wider straw make the liquid flow faster?



@ved7690 　2일 전

This is interesting, made me stop and think.

Here in both the cups, the height difference between the surface of the water and the end of straw is what matter, because the greater the height difference the higher the pressure so faster the water flows.

Pressure = rho x g x h

The length is not what matters here,  think of a over head water tank placed at roof of a 2 story building. The pressure is greater at ground floor pipe compared to one at 2nd floor. at same height difference/floor, a longer hoose will give same amount of water as a normal pipe.

2026-11-10 00:38

[ytcid:UgyaY-_3JJ_1VyIm2Ml4AaABAg] This is interesting, made me stop and think. Here in both the cups, the height difference between the surface of the water and the end of straw is what matter, because the greater the height difference the higher the pressure so faster the water flows. Pressure = rho x g x h The length is not what matters here, think of a over head water tank placed at roof of a 2 story building. The pressure is greater at ground floor pipe compared to one at 2nd floor. at same height difference/floor, a longer hoose will give same amount of water as a normal pipe.



@ethicswithdish… 　3일 전

The resistance inside the straw makes this more complicated than I expected

2026-11-09 20:31

[ytcid:Ugz44Wc7-yoq5nHkGjR4AaABAg] The resistance inside the straw makes this more complicated than I expected



@princevamsee33 　3일 전

This experiment is a good reminder that longer doesn't always mean faster.

2026-11-09 20:27

[ytcid:Ugxcfh_S1ccQnsW1Lct4AaABAg] This experiment is a good reminder that longer doesn't always mean faster.



@ecozora 　3일 전

So gravity is actually doing most of the work here?

2026-11-09 18:42

[ytcid:UgwWu_ciMlB5jJATvzp4AaABAg] So gravity is actually doing most of the work here?



@smexpertsameer 　3일 전

I'd like to see the same experiment with different straw widths.

2026-11-09 18:37

[ytcid:UgwNWHoXWS26Hcj7-2Z4AaABAg] I'd like to see the same experiment with different straw widths.



@theuncoverreal… 　3일 전

So the height difference matters more than the straw's total length?

2026-11-09 18:36

[ytcid:UgzVRZPca2cPJmX5gTR4AaABAg] So the height difference matters more than the straw's total length?



@TechVerseShort… 　3일 전

Does the straw's diameter change the result too?

2026-11-09 18:32

[ytcid:Ugx_NWRHZ-FBkOQN5nV4AaABAg] Does the straw's diameter change the result too?



@MZUW4ZDNMU 　2일 전

more liquid = more pressure

2026-11-10 13:57

[ytcid:Ugz530_E0HwVsjoyI0d4AaABAg] more liquid = more pressure



@saranga7809 　21시간 전

The gravity increases the velocity and that creates more  suction in longer gravity directional (downward) continuous hole-less tube.

2026-11-12 02:07

[ytcid:Ugx5V8VWAJ3KKSkqj2N4AaABAg] The gravity increases the velocity and that creates more suction in longer gravity directional (downward) continuous hole-less tube.