Timeline for Should this object float?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 22, 2021 at 12:38 | vote | accept | John Hon | ||
| Feb 19, 2021 at 16:59 | history | became hot network question | |||
| Feb 19, 2021 at 10:28 | history | edited | Qmechanic♦ |
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| Feb 19, 2021 at 9:52 | comment | added | Gert | $P=\rho g h$ is really $P=P_0+\rho g h$, acc, Pascal, where $P_0=P(0)$... | |
| Feb 19, 2021 at 9:27 | answer | added | Naman Parikh | timeline score: 3 | |
| Feb 19, 2021 at 9:20 | comment | added | John Hon | @CookieNinja the stuff below is still water - sorry that i didn't make it clear | |
| Feb 19, 2021 at 9:15 | comment | added | Nik | In the set-up you propose, the puck would stay static. Water is (pretty much) incompressible, so if the puck perfectly touches the walls of the container, there is nowhere for the water below it go. In order for the puck to sink, the volume of water below it would have to decrease, and that can only happen if it flows upwards, between the puck and the wall of the container. | |
| Feb 19, 2021 at 9:15 | comment | added | CookieNinja | Think about this for a sec. You state that the pressure at the bottom is the pressure at the top + the pressure of the resting puck. But is it tho? I don't know if the cavity underneath is a vacuum or highly compressed gas. | |
| Feb 19, 2021 at 9:12 | answer | added | BioPhysicist | timeline score: 5 | |
| Feb 19, 2021 at 9:08 | comment | added | Karim Chahine | I feel like the second term in $P_{total}$ should account not only for the mass of the puck but also for the buoyancy force acting on it, as that should decrease the force acting on the water below the puck | |
| Feb 19, 2021 at 8:51 | history | asked | John Hon | CC BY-SA 4.0 |