<s>[INST] How does a steam engine work [/INST] A steam engine works by using heat energy from burning fuel, such as coal or wood, to heat water in a boiler. The heated water turns into steam, which is then directed into a cylinder. The steam exerts pressure on a piston inside the cylinder, causing it to move back and forth. The movement of the piston is then transferred to a crankshaft, which converts the reciprocating motion of the piston into rotary motion, turning a wheel or other machinery. The steam then exits the cylinder and is condensed back into water, which can be reused in the boiler.</s>\ <s>[INST] In this process, does the steam condense and return to the boiler without loss, or is there a factor that reduces the total amount of water? [/INST] It depends on the particular design of the steam engine. If the engine uses a dry cooling tower, it is possible that no water is lost.</s>