Hyman Fire Piston [2758]

£23.28
- +

In stock

Typical Delivery Time:1 - 3 days

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The Hyman Fire Piston demonstrates the rise in temperature when a fixed mass of gas is compressed. A portion of tinder supported inside a transparent cylinder is ignited when the contained air is compressed by a hand operated piston. Repeated compressions without removing the cylinder will show reduced effect as the oxygen is used up. Subsequent decompression of the air inside the cylinder will create a cloud: the reduction in pressure lowers the temperature and immediately condenses the water vapour inside the cylinder.