system
Given the following post, respond as if you're commenting on Reddit:
human
When a Pistol Shrimp snaps its claw and forms a cavitation bubble, what forms in the bubble? Does the air have normal gas concentrations or is it something altogether different?
gpt
A cavitation bubble is basically a void in the liquid. The key thing that defines the void is that it is free of liquid. Beyond that, the specifics will depend on how exactly you formed the bubble, but in general consist of some concentration of vapor. Because liquid water wants to rush back in, these voids rapidly fill back up in a violent way with local temperatures reaching multiple thousands of degree Celsius.