Fusion

The video tutorial explains the concept of fusion, highlighting its occurrence in various fields. It begins with a general introduction to fusion as a process of making a unified whole. The tutorial then explores biological fusion, where male and female sex cells join to form a zygote. It also covers nuclear fusion, where atoms combine to form larger atoms, releasing energy. Finally, the video discusses engineering applications of fusion, such as welding, where metal pieces are joined by melting and solidifying to form strong joints.

What happens to metal during the welding process?

What is the result of the cooling and solidifying of welded metal?