Physics questions

[Anomalocaris]

 I just found out that the sound barrier was broken over 100 years ago!

Can you guess how?

Gonna guess firearms of some sort.


Boru

Interesting thing about breaking sonic barrier,  biomechanical study of the structure and musculature of the tails of some of the long tailed sauropod dinosaurs (the type of plant eating dinosaurs similar to the colloquially named brontosaurus) show they can easily break the sound barrier with the tips of their tails, thus cracking it like a bull whip about 150 million years ago.   It was probably an evolutionary defensive feature.

Also some modern shrimps can snap their specially adopted pincers closed at speeds faster than the speed of sound under water, that is many times the speed of sound in air.   Each time the pincer closed it creates a miniature sonic boom underwater.  In areas where large populations of such shrimp resides the sound of their pincers snapping shut forms a continuously back ground sizzling sound like pouring water onto a hot pan that disturbed sonar and makes submarines difficult to track.    In other shrimp the entire pincer can be  swung at supersonic speeds underwater and used like a club to strike at targets.   This kind of shrimp can alledgedly break aquarium glass by hammer it with its pincer.   It’s reasonable to suppose similar features have arisen repeatedly amongst arthropods over the last 540 million years.