After the arrow was shot out, Pei Min stepped forward and ran backward.

Pei Min has never seen the power of eighty kilograms of black gunpowder, so he dare not be careless at all.

He didn't want to be the first pioneer in history to kill black gunpowder, and he still owned the black gunpowder.

By practicing Sun Simiao's health-preserving and breathing method, his explosive power is now extremely strong, and he can reach a distance of ten seconds in a hundred steps.

They gathered with Li Longji and their large troops.

Thinking that the distance of one hundred feet was almost the same, I couldn't help but have a thought in my mind: What would happen if the explosives were much more powerful than I imagined and all the people were killed?

Of course he just dared to think about it...

If he really killed all the civil and military officials in the court, then Pei Min would be a sinner for the ages.

Black gunpowder is not explosives from later generations, and it explodes immediately as soon as it reaches the boundary point.

The principle of black gunpowder explosion is that potassium nitrate decomposes oxygen, causing charcoal and sulfur to burn violently, instantly producing a large amount of heat, nitrogen, carbon dioxide and other gases. Due to the rapid expansion of the volume, the pressure increases violently. About every four grams of black gunpowder burns, 280 liters of gas can be produced, and the volume can expand nearly ten thousand times. In a limited space, the gas expands rapidly under heat and causes an explosion.

Therefore, the black gunpowder is an explosion caused by burning, causing the gas to squeeze and expand.

The smaller the space range of the gas, the faster it explodes.

The rammed earth hut has a certain space. When the gas does not fill this space, it will only burn rather than explode!

This burning takes a certain process!

All civil and military officials looked at the rammed earth hut nervously and solemnly. After Pei Min shot the arrow, Li Longji and Gao Lishi secretly stuffed cotton into their ears and stared at the rammed earth hut.

One second!

Two seconds!

Three seconds!

Four seconds!

Until ten seconds later, Pei Min ran to the nearest place, the rammed earth hut still had no reaction.

It was only a few breaths for dozens of seconds, but the crowd held their breath and looked forward to it, and it became a long time.

Unexpectedly disappointed...

Various emotions appeared on the faces of civil and military officials.

Even Li Longji and Gao Lishi couldn't help but look at Pei Min.

Pei Min knew the principle of the explosion of black gunpowder and smiled and said, "Let it burn for a while!"

A few more seconds passed!

Lu Huaishen glanced at Pei Min proudly, thinking that it was indeed a little hairy child, with no hair on his lips and was not doing things safely, and said, "I..."

He just spoke!

Sudden!

There was a loud "boom" sound!

a bolt from the blue!

The earth shakes!

The eighty kilograms of black gunpowder are extremely powerful!

Although the rammed earth hut is strong, it cannot withstand the power of the explosion...

The rammed earth hut flew in four rifts, and flames soared into the sky, rushing to all sides at a terrible speed.

The air flow gathered like a wave, rushing towards all directions, rolling up dust on the ground, forming smoke and dust like a tsunami, and emerging in all directions...

The burning of saltpeter will produce huge black smoke, which gathers in the sky to form a terrifying black cloud of mushrooms...

Even people like Li Longji, Song Jing, and Su Feng have never seen such scenes caused by human power.

Li Longji's face changed suddenly, and he felt that the spectacular wave of air rushed towards him, and he couldn't help but take a small step back.

Pei Min was mentally prepared and helped him in time.

Li Longji calmed down and then calmed down.

The civil and military ministers around them were not so lucky. They were not mentally prepared, just like thunder in the plains, which made them dumbfounded and felt a sense of fear in their hearts.

Especially when the dust waves roar, some people's feet become weak and they want to move, but they can't move, and they feel like they are slumped to the ground.

Song Jing had his tongue and his mouth wide open, looking like he was a ghost for a hundred days.

Su Feng was shocked and hugged his ears with both hands and his eyes closed, not daring to look again.

Especially Lu Huaishen, others were still on guard. Seeing that the rammed earth hut had no movement, he only thought that in the face of the solid hut repaired by the Ministry of War, Pei Min's small tricks were useless and he was in a relaxed mood.

Suddenly, a shocking explosion!

The Prime Minister was so scared that he beat the monsters with food that he was old but could eat and sleep. He took three steps in a row, but because his soles became weak, he squatted on the ground with his butt. He looked at the rammed earth hut that had become ruins in ignorance, and said in a daze: "How is it possible, how is it possible! How can this human power create such a great power?"

When Pei Min heard this, he curled his lips disdainfully and said, "It's so strange!"

In the 21st century, he had seen the blasting of a tall building, and that explosives were the real explosives, so he naturally didn't think it was strange.

But in ancient times, human power deliberately created such a terrible momentary explosive force, and this experiment was the first time in ancient times.

All the civil and military officials here, except Pei Min, are all frogs in the well.

When I first saw this scene, how could I not be afraid or shocked?

Not only were they in the military academy, but also the entire Ministry of War, and even the surrounding departments, for this shocking sound, I wonder how many teacup pens were broken and broken...

A group of unknown people thought the earth dragon had turned over. Some ran out of the house in panic, while others were directly under the desk.

The guards of the Ministry of War flocked to the military academy for some reason, intending to protect their vehicles.

Pei Min turned around and looked at Lu Huaishen sitting on the ground. He didn't want to miss this opportunity to take advantage of the situation and said with apologies: "I didn't expect that the power of this black gunpowder was too great, so he actually sat on the ground with shock, and the faults of the bottom and the faults of the bottom."

He said as he reached out to help Lu Huaishen.

Lu Huaishen could not afford to lose this face. He wanted to force himself, but his limbs were weak, and he only sat down half of them.

It was Cui Yuan, the Minister of Works, who helped him up.

"What do you think?"

Pei Min stopped when he saw that he was good and looked at all the civil and military ministers.

After a while, Song Jing bowed deeply to Pei Min and said, "Duke, I am a god!"

This was a plea of ​​convincingness!

The emergence of black gunpowder is of too great significance.

With black gunpowder, building mountains and building ridges and building bridges and roads will save you so much manpower, material resources and financial resources. This is completely uncountable.

The Tang Dynasty mastered black gunpowder, which had a cross-age significance.

Su Feng also bowed deeply and said, "The Duke of the Kingdom made such a magical object reappear in the future, and his contributions will be made to the country!"

Li Longji took out the cotton from his ears and laughed: "Even with this thing, I feel shocked. With this magical object, I finally understand why Pei Aiqing is full of confidence!"

All civil and military officials couldn't say a word, and the power of black gunpowder shocked them.

This advanced product beyond their understanding, this scientific object made by manpower.

A blast of explosion shattered their old consciousness and opened the dry well that trapped their horizons... made them realize the greatness of human power.

As long as you have pursuits, there is nothing you can't do. Not to mention building mountains and building ridges, even if you go to the world and go to the sea, it's still possible.
Chapter completed!