Chapter 750

"Try and try." Zhou Yan said with a smile, "you will know how difficult it is after you try it! I've been practicing for a long time to get six consecutive drifters! "

The girl lowered her head and picked up a stone.

Zhou Yan immediately said, "no, no, no, you don't have a good choice. You have to choose a flat or dish shaped one."

"If it's OK, I'll practice."

"Yi Mei, everything must be strict!" Zhou Yan has a strong sense of variety. She just plucked the stone from her suitable hand, led her to select the stone carefully, and commented on the stone one by one, "too big, no; too fat, no; too ugly, even worse."

The variety show effect came out in a flash.

Yanbao Yangou is really hammered! 】

- [it's so lovely to take Yi Mei to look for stone when she is three years old! 】

- [I laugh to the sky, Yimei is too difficult! Every day in the feeling of baby, Yu Yu baby, Lan Lan little brother, now also to a giant baby Yanbao! 】

…

Finally, Zhou Yan selected the right stone and came to the popular science of Duan in a serious way:

"Yi Mei, do you know why stones can be played when you are floating in the water? In fact, it's very simple. The higher the velocity, the smaller the pressure.

The density of the stone is higher than that of the water. When the water floats, the water will flow quickly in a short time, so the water surface forms pressure on the stone.

When the pressure is greater than the gravity of the stone, the rock will bounce. The more times this happens, the more times the stone will jump on the water

"Well, principles of fluid mechanics."

Zhou Yan thumbs up: "smart."

The audience in the live broadcasting room is almost stupid.

Don't you just make a splash?

Why is it so advanced?!

Xiangyi weighed the stone in his hand, and had to say that Zhou Yan was well chosen and felt excellent.

The girl held the stone with her thumb and thumb, and her index finger was behind her. When she saw this gesture, she called out to the expert: "Hey, expert!"

With a calm smile, she bent down slowly with elegant and casual posture. She seemed to have no strength. She moved the stone with her index finger, but the stone was thrown out by her with a very strong force!

"Bang!"

"Bang!"

“……”

After more than ten times of continuous sound, the stone "flopped" and sank to the bottom of the water!

Zhou Yan:?

Audience:?

Is it an illusion? Must be?!

Appropriate but "Oh" sound, seems to be not satisfied with the results, she took out a spare stone, threw it again!

The familiar "bang bang" sound, once again dominates everyone!

This time, it sounded 23 times!

Zhou Yan is stupid.

Think of just now oneself said "call big brother I teach you", his toe awkwardly picks the sole of the shoe, wish to jump into the pond on the spot!

This is the fuckin 'thing It's not scientific!

"Once upon a time, there was a professor who summed up a famous equation - water drift equation through the weight and speed of stones and the influence of air," she said

Zhou Yan was bewildered: "ah?"

The audience are in a trance: "is Yimei fooling people? Yeah?? 】

just listen and continue: "the equation is: MxA = P – Mg + air effect. M is the mass, a is the vertical acceleration, P is the feedback pressure of the water surface, and Mg is the gravity.

This equation plays an important role in the study of "aircraft icing" and has been applied in criminal investigation to calculate the spatter of blood

Zhou Yan???

Audience:???

Excuse me, I really do.

Is this science?

I'm sorry, I'm not worthy of it!!

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