Key takeaways:
- Liquid nitrogen is extremely cold, approximately -196 degrees Celsius.
- It is used in various applications such as freezing dirt for tunnel construction, retrieving fingerprints from duct tape, and removing moondust from spacesuits.
- Liquid nitrogen can potentially be used for fire suppression and as an alternative fuel source in vehicles.
Uses of Liquid Nitrogen #
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Tunnel construction: Liquid nitrogen is used to freeze dirt, which helps stabilize underground holes during the construction of tunnels for cars, trains, and vertical mine shafts. It is faster and environmentally friendly compared to using brine.
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Retrieving fingerprints: In forensic science, liquid nitrogen is used to separate pieces of duct tape and retrieve clearer fingerprints than other methods. Researchers are working on refining the technique for optimal results.
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Removing moondust: Liquid nitrogen can be used to effectively remove about 98 percent of clingy moondust from fabrics. This method causes less damage to spacesuits and is being considered for future moon missions. The Leidenfrost effect is responsible for the unique space-suit laundry service.
Potential Uses of Liquid Nitrogen #
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Fire suppression: Liquid nitrogen can potentially be used to suppress forest fires and fires in enclosed spaces by starving them of oxygen. However, challenges remain in developing the technology for real-world applications.
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Alternative fuel source: Liquid nitrogen-powered vehicles have been proposed as a more environmentally friendly alternative to electric cars. The engine would work similarly to a steam engine, with nitrogen vapor turning the motor. Researchers claim that these cars could match the performance of modern electric vehicles.
Summary for: Youtube