Smarter Every Day

[mauser]

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So, shooting an AK-47 underwater. Just sounds like something some redneck would do. That is until you get out the insanely high-speed camera, and start taking a serious look at what the physics involved do. The coolest thing is seeing the resulting air-bubbles, some of which are NOT what you would think, not only expand and collapse, but then,

Comments

[ford_prefect42]

That was nice!
The reason that the bubbles re-expand is that the momentum of the water as they collapse compresses the bubbles past equilibrium, they then re-expand again past equilibrium, and the cycle repeats until the excess energy is dissipated into the surrounding water.

eta... sorry, I hadn't watched that far when I posted this.

[retooned]

Thanks.