Timeline for Why doesn't a table tennis ball float on a surface of steel balls? How do we calculate buoyancy here?
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Apr 2, 2019 at 12:21 | comment | added | Hot Licks | It's complicated. If you look at the container in the picture, below the top few layers the balls have organized themselves into rows and diagonal columns. Depending on the exact geometry of the balls and the container, this organization could effectively jam everything into place and prevent movement (absent sufficient vibration). | |
| Apr 2, 2019 at 5:23 | comment | added | enbin | @HotLicks Will wedges exist without friction? | |
| Apr 2, 2019 at 2:53 | comment | added | Hot Licks | They will produce buoyancy, but it's not a given that this will be sufficient to overcome the force of the balls pressing down from above, especially since the balls are apt to be "locked" in place due to being wedged together. | |
| Apr 2, 2019 at 2:47 | comment | added | enbin | @HotLicks Because there is no friction, will the bearing balls at the bottom of the table tennis ball not produce buoyancy to the table tennis ball? | |
| Apr 2, 2019 at 1:56 | comment | added | Hot Licks | Some of the ball bearings sit above the midline of the ping-pong ball and push down on it. Even if the ball bearings too were free of all friction they would still be locked in place by the weight other ball bearings above them. | |
| Apr 1, 2019 at 22:58 | comment | added | enbin | @HotLicks Would it come up without friction? | |
| Apr 1, 2019 at 22:51 | history | edited | enbin | CC BY-SA 4.0 |
added 40 characters in body
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| S Mar 29, 2019 at 8:56 | history | suggested | curiousdannii | CC BY-SA 4.0 |
more specific title
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| Mar 29, 2019 at 7:20 | review | Suggested edits | |||
| S Mar 29, 2019 at 8:56 | |||||
| Mar 28, 2019 at 22:38 | history | edited | enbin | CC BY-SA 4.0 |
added 1 character in body
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| Mar 28, 2019 at 19:31 | comment | added | Hot Licks | Shake the bowl a little. Like Brownian motion on water molecules. | |
| Mar 28, 2019 at 12:00 | history | tweeted | twitter.com/StackPhysics/status/1111236644093550592 | ||
| S Mar 28, 2019 at 11:04 | history | suggested | JAD | CC BY-SA 4.0 |
slightly changed wording in title
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| Mar 28, 2019 at 10:34 | review | Suggested edits | |||
| S Mar 28, 2019 at 11:04 | |||||
| Mar 28, 2019 at 8:41 | history | became hot network question | |||
| Mar 28, 2019 at 7:55 | answer | added | John Rennie | timeline score: 40 | |
| Mar 28, 2019 at 7:49 | answer | added | David Newell | timeline score: 2 | |
| Mar 28, 2019 at 7:02 | history | asked | enbin | CC BY-SA 4.0 |