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Li Zhen turn prepare their own teaching materials, he glanced after two, wrote two words on the blackboard.
'air resistance'
See the words, they were all excited intense licking utter words, staring Shining Li Zhen.
"Air resistance. What is who is going to talk about air resistance?"
Xiao liter resistant hands stood up: "You talk fluid dynamics when the Li, who had talked about the resistance that thrust reversers over the air resistance and fluid mechanics in the kind of resistance is similar.?"
Li Chen sat him down and said:. "Specifically air resistance means the air force that opposes the motion of the object, moving object is generated by the elasticity of air objects at run time forward, because the front of the air is compressed, both side surfaces of the friction with the air, and the space behind the tail portion becomes a vacuum, the resistance caused by these effects. upwind at runtime, but also including the additional wind ...... "
"So, what can be made directly reflect the resistance of the air in it? To rain umbrella, and hair when the umbrella would sometimes blow off. I do not know the truth now you have not been."
Then Li Zhen, Liu Jinghong shouted: "? It is greater than the area, the greater the resistance against the wind."
"You can say that."
Li Chen has said: "there is resistance, the air force; and aerodynamic simply is how dependent at some point, the best balance these two completely opposite to the force of air flow caused by environmental factors during actual operation. pressure hook. otherwise you will not see what is the difference between the air force and air resistance ...... "
"Objects in the forward movement due to the action of high air resistance, while producing three longitudinal, lateral and vertical and the like around the center of gravity of the aerodynamic forces, which is the largest longitudinal air air resistance force, about the overall air resistance than 8o% ...... "
Lin Xiufeng anxiously took notes, he felt he had completely did not understand.
Bible, purely hieroglyphics.
Although Li Chen has been very hard to say progressive approach, but still do not understand. Truth know everything, but ...... always feel unspeakable.
Qin Enze Question: "The bird is able to fly into the sky, because they have wings so the thrust reversers come is not to say, like a fan, like a bird's wings flapping, the formation of a reaction in the air to obtain a. lift? "
Li Chen shines: "For although there are many more complicated things exist, but really this principle.."
Qin Enze nodded and sat down, the people are generally ecstatic, I do not know what to think again.
Liu Jinghong suddenly the question:. "Well, if humans want to fly into the sky to create a device with wings, we can not let the two wings, in order to gain momentum by beating the air, produce an upward lift , a downward reaction force off? "
Li Chen waved his hand:. "Complicated your idea is not wrong, but as I said, the principles of the birds into the sky and complex than you might expect and want mankind into the sky, not necessarily constrained. in principle birds. we can use other truth can do. Do not interrupt my lecture, I continued. ""......"
. "Aerodynamics research, both theoretical and experimental points of both theoretical and experimental studies are closely bound to each other, complement each other in accordance with the general principles of the theory of the Institute are: kinematics, follow the law of conservation of mass ...... follow the law of conservation of energy ...... "
"......"
Finished physics, Li Zhen ate lunch, went to several colleges.
The number of starving people look at a group of college Li Zhen, have some tension and fear.
They recently more and more now, which is really able to learn higher mathematics dead.
A concept thrown out, after-school study had already been a crazy several. They were a little frightened, and this human mind really is ...... horrible.
Human brain hole Why so big? Why so big?
Mathematics Math Is not it? Is not the mathematical calculation Xiao Ming bought a couple of pounds of pork, it took twenty, seeking a pound of pork, how much money equal to what?
Why learn math ...... behind, is simply not figure it out. Why it has become various letters, various formulas, various modes of thinking, concepts ......
Going crazy.
"Li Shih good."
Li Chen nodded: "Well, today we talk about algebraic functions."
"......"
"The more a function is called non-algebraic functions. Examples include polynomial algebraic functions and square root functions. Indefinite integral of a function operation is a rich source of the function, indefinite integral as a logarithmic function arose from the reciprocal function of ......"
You look at me, I look at you.
I do not understand.
I knew the physics.
I knew school chemistry.
Even mathematics Daniel Hou Qiang, this time also completely senseless.
There is a girl shook Hou Qiang, whispered: "? Have you ever heard heard throughout the whole text, no math class a number of it."
Hou Qiang wry smile: "This is not studying thing?"
"......"
Li Chen lecture talking about surging stricken.
Kyushu physics at a time when it had such a thing.
Qin Enze whole person, like magic startled, sitting in the lab muttering: "Why fly overhead human Clearly, the use of wings is flying impossible the Li said that humans do not have that kind of muscle, not possible?. with the power of hands incitement air, let itself vacated while the mechanical or steam, it is simply not enough to allow the device to incite the wings. "
"But it must be able to take to the skies of absolutely no problem."
"Human wants to take to the air, it only needs to be two forces. Upward lift, forward momentum."
Qin Enze whisper, puffed his pipe lit, SG eyes suddenly flash, a clap of thunder resounded in the minds.
"If you can replace the steam power forward, then just need to get up in the lift, you can achieve the effect of flight, the wings are not specific construction needs of birds ah. Power forward does not need to now how to solve the problem, I now have to prove it personally upward lift ...... "
Glanced Physics Laboratory, everyone is debating, Qin Enze silently holding a bong out of the physics laboratory.
The first person to eat crab, a first person adventure.
Li Chen human whole Kyushu first proposed air resistance,And Qinen Ze, who will be the first to show Kyushu air resistance.
Aerodynamics must combine theory and practice, and ultimately proved that crazy Qin Enze about to prove the existence of air resistance.
When Li Chen from the number of Academy giddy to come out, and suddenly the entire Kyushu Academy of sensation, screams, cries after another.
"Qin Enze want to jump out!"
"The Li, bad, grace to jump up!"
"Quick, call the doctor right. Then quick to take the sheets in the bottom."
"Qin Enze not have room for error ah, he is a mainstay of the physical hospital."
"Oh, you can not figure out how grace ah, why do you want to jump off ah."
"Enze, academic figure out the problem, you can take your time thing. Why commit suicide."
"......"
All throughout Kyushu Academy of shock, everyone rushed out to the tallest school building. A total of ten layers, more than thirty meters high.
Li Zhen complexion becomes mad, threw books on bolted away.
When he got there the highest teaching downstairs, surprised to find the top edge of the roof, Qin Enze eyes closed waiting for something. Whisper something in his mouth.
"Grace!"
Li Chen yelled out: "Down!"
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