Liquid Nitrogen Demos

The video explores how extremely low temperatures, achieved using liquid nitrogen, can alter the physical properties of various materials. Through experiments with flowers, bananas, and rubber balls, it demonstrates how these objects become brittle or harden due to molecular changes. The video also introduces cryogenic engineering, highlighting its applications in strengthening metal alloys and creating superconductors for technologies like magnetic levitation trains.

How does the freezing of water in materials affect their physical properties?

What is cryogenic engineering and what materials are commonly used in this field?

Discuss the significance of superconductors in cryogenic engineering.