An aeolipile, also known as a steam engine or Hero's engine, is a device that converts thermal energy into mechanical energy through the use of steam. It consists of a simple chamber that holds water and is equipped with one or more outlet pipes at right angles. When the water inside the chamber is heated, it turns to steam, which exits through the pipes. The rapid expulsion of steam causes the aeolipile to rotate, demonstrating the principle of reaction propulsion.
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