A collapsing underwater bubble can reach temperatures hotter than the sun's surface
The violent collapse of underwater bubbles during a process called cavitation can generate localized temperatures of 5,000 Kelvin, momentarily rivaling the intense heat found on the surface of the sun.
When underwater pressure drops below 2 kilopascals, water vaporizes to form bubbles that eventually implode with immense violence. This phenomenon, known as cavitation, creates microjets traveling at 1,000 meters per second and temperatures reaching 5,000 Kelvin. This is hotter than the sun's surface, providing enough thermal energy to erode metal propellers over time.
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