The highest art of war is to defeat the enemy's plans, a battle of public opinion! (Part 1)

"When an object's speed approaches the speed of sound, it gradually catches up with the sound waves it emits. At this point, because the compression of the air caused by the mecha itself cannot propagate quickly enough, it gradually accumulates on the mecha's windward surface and in the surrounding area, eventually forming a surface across which the air's physical properties-pressure, temperature, velocity, and density-change abruptly: a shock front."

"The shock front increases the air's resistance against the aircraft. This is commonly known as the sound barrier."

"The shock front formed when a mecha enters supersonic flight is a surface where acoustic energy is highly concentrated, so it is also called a sound cone. To the ear, the sound cone manifests as a brief but extremely powerful explosion, hence the name sonic boom. Supersonic flight also compresses the surrounding air, causing the water vapor in it to condense into a cloud, which is why it is called a sonic boom cloud..."

Holding a textbook he had written himself, Huo Yuhao explained the lesson to the people seated below him. Suddenly, however, several knocks came from outside the nearby door of the Soul Tool Research laboratory.

"Knock, knock, knock..."

The laboratory door opened, and Director of Education Lin Jiayi walked in. Despite his exceptionally high standing within the Sun Moon Royal Soul Engineer Academy, he bowed to Huo Yuhao, then gestured for him to step outside.

Huo Yuhao nodded and told the students to work through the concepts he had just explained on their own before leaving the laboratory.

"Director Lin, is something the matter?"

Lin Jiayi gave a slightly awkward cough. A trace of reluctance to part with him appeared on his face as he said to Huo Yuhao, "Mr. Huo, the Purple Victory Army has sent word asking you to