What device, known by 100 AD in Austronesian regions, exemplified early rapid energy expansion?

Answer

Fire piston.

The earliest documented concepts involving rapid expansion of gases for practical effect predate modern mechanics significantly. Specifically, by the year 100 AD, the fire piston was recognized as a known device concentrated in Austronesian regions. This device perfectly illustrated the basic principle of using rapid compression to generate sufficient heat, which was then capable of igniting tinder placed inside it. This serves as a foundational, rudimentary example of harnessing swift energy release before more complex engine designs were conceived.

What device, known by 100 AD in Austronesian regions, exemplified early rapid energy expansion?

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