"Only in this way can we roughly calculate the intensity of damage caused to the ground by the meteorite falling from the sky."

The boy explained as he walked over to the ladder they had prepared, "As you can see, we have prepared five ladders of different heights. ”

"They are two meters, five meters high, eight meters, eleven meters and fourteen meters in height."

The father and daughter also saw that the five ladders were placed quite far apart.

I think these students don't want to be affected by each other, so they made this arrangement.

She smiled more and more satisfied.

"First of all, we asked Lu Congjun to climb the lowest two-meter-high ladder."

Following the boy's words, the simple boy walked out and climbed the ladder with quick movements.

Immediately, everyone saw several boys using the principle of levers to send the prepared stones up, and Lu Congjun stood on the ladder with his legs and carefully picked up the stones.

When the audience saw this, their hearts hung in the air, and some people couldn't help but get up from their seats and stare at his movements.

The students who sent the stones retreated quickly, while Lu Congjun stood straight on the ladder, his hands naturally loosened, and the big stone fell to the ground with a whoosh.

Then there was a thud.

The audience instinctively swallowed their saliva, wondering what the students would do next.

But soon they knew.

The boy who only listened to the explanation spoke again: "Everyone saw it, now the stone has fallen to the ground, and it is obvious that a hole has been smashed out of the ground." ”

Everyone: "......" can you not smash out of the pit? A stone of that size fell from such a height.

I thought so, but no one spoke.

Because everyone saw that the remaining five students, three men and two women, stepped forward with tools, and first drew a circle of lines close to the ground where the stone landed.

At the same time, the narrator is still explaining: "Now, my classmates have chalked out the location of the stone in the pit. ”

"If you move the stone out, you can figure out how deep it will be in this hole."

"There are a few places left, and the same method will be used to measure them, so everyone wait."

"It's a big move."

Behind Yingzheng's father and daughter, the Minister of Civil and Military Affairs and the deans of various academies began to discuss in a low voice, "It seems that these students have really learned something." ”

"That's nature."

The two giants of the Mo family and the public loser heard someone praise their students, and proudly answered.

Then the two looked at each other, and then snorted silently and turned their faces away.

Zhong Wenwu didn't care about the reaction between the two of them, and each muttered, "It's only two meters...... By the way, how many feet is two meters? ”

"Her Royal Highness said that one meter is about equal to one thousand four hundred and forty-two feet in my Qin, and two meters is two thousand eight hundred and eighty-four feet."

"Ouch, Her Royal Highness is too easy to teach this decimal point."

"It's easy to use, but it's a bit troublesome to calculate."

"What's the trouble with this, it's rounded up anyway, hahaha......"

"No, the ladder is two meters, plus the height of the student holding the stone, not only two meters."

"It's not much worse, and the student didn't stand in the highest position?"

"Now you are a layman, the height of the ladder that people say means that people can stand in the highest position, not the height of the top."

"Then plus that student's height, it's three meters tall, wow, eight feet tall!"

……

Xu Yan listened to the discussions of the civil and military ministers behind her, and a smile rose on the corner of her lips.

It's really in vain that she has fully popularized these basic knowledge in the past few years, and look, these ministers will convert the unit of Qin ruler to rice.