Does carbonation cause straws to float in water?

  • Thread starter Thread starter cragar
  • Start date Start date
  • Tags Tags
    Buoyancy Water
AI Thread Summary
Carbonation in beverages like Coke can cause straws to float due to the formation of bubbles. When the straw is placed in the carbonated drink, bubbles may attach to its surface, creating enough upward force to lift it. In contrast, a straw in still water does not experience this effect and remains at the bottom. The phenomenon is primarily attributed to the interaction between the bubbles and the straw, rather than surface tension alone. Understanding this can clarify why straws behave differently in carbonated versus non-carbonated liquids.
cragar
Messages
2,546
Reaction score
3
So when i go to a restaurant and order a coke with no ice and the waitress brings it back with a straw in it the straw never stays in the glass. When i get it the straw is resting on the edge of the glass with the end barely in the coke, my guess is that it is held up with surface tension. But when I try to put the straw back in the glass normally it slowly starts to rise back up. But if the straw is just in water it will stay put at the bottom of the glass. So is it possible that some of the carbonation is bubbling up and hitting the straw making it go up?
 
Physics news on Phys.org
It's the bubbles attaching themselves to the side of the straw and growing.
 
thanks for your answer, That makes sense
 

Thread 'Is calling fictitious forces "not real" just about terminology?'

Hi there, im studying nanoscience at the university in Basel. Today I looked at the topic of intertial and non-inertial reference frames and the existence of fictitious forces. I understand that you call forces real in physics if they appear in interplay. Meaning that a force is real when there is the "actio" partner to the "reactio" partner. If this condition is not satisfied the force is not real. I also understand that if you specifically look at non-inertial reference frames you can...
View full post »

Thread 'Inclined treadmills and Galilean Invariance'

This has been discussed many times on PF, and will likely come up again, so the video might come handy. Previous threads: https://www.physicsforums.com/threads/is-a-treadmill-incline-just-a-marketing-gimmick.937725/ https://www.physicsforums.com/threads/work-done-running-on-an-inclined-treadmill.927825/ https://www.physicsforums.com/threads/how-do-we-calculate-the-energy-we-used-to-do-something.1052162/
View full post »

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
View full post »

Similar threads

I What Keeps Water in a Straw When It's Removed from a Glass?
Replies
12
Views
5K
Transient Response of Straw Filling with Water
Replies
2
Views
2K
How does water rise along a glass plate? (surface tension question)
Replies
2
Views
1K
Solving the Fluids Straw Problem: Compute Water Fraction in Ideal Gas Model
Replies
1
Views
3K
Explaining Pressure: Candle + Water + Jar Experiment
Replies
3
Views
5K
Why does water level stay the same when ice melts inside the water?
Replies
3
Views
5K
Why Do Melting Antarctic Ice Caps Cause Sea Levels to Rise?
2
Replies
52
Views
8K
When ice melts in a full glass of water, will the water overflow
Replies
11
Views
51K
A water fountain that seems to defy gravity
Replies
11
Views
5K
What caused the strange water leakage from a sealed jug?
Replies
17
Views
2K

Hot Threads

Recent Insights

Back
Top