Questions came out of Zhao Huanyi's mouth like a string of cannonballs. Li Qingzhao opened her mouth, then closed it again, completely stunned.
Water flows to the lowest point, and leaves from trees fall to the ground in autumn. Aren’t these things natural?
Does this need explanation?
But------why?
"Even in the smallest things, there is great knowledge hidden. In this world, you need to constantly discover it. To do science, you must have a heart that is always thinking."
This is the attitude towards scientific research.
The force of gravity on an object is proportional to its mass, calculated using the formula: G = mg, where g is the proportionality factor, approximately 9.8 N/kg. Gravity changes with latitude; an object with a mass of 1 kg experiences a force of 9.8 N. The point where gravity acts on an object is called its center of gravity.
1. The essential source of gravity is the gravity of the earth.
2. Gravity is an apparent concept. It is the gravitational force exerted on an object when it rotates with the earth.
3. Gravity is equal to the vector difference between the gravitational force exerted on an object by the earth and the centripetal force required for the object to rotate around the earth's axis.
4. The direction of gravity is always vertically downward. (Not vertically downward)
5. Gravity is caused by the attraction of the earth, but it cannot be said that gravity is the gravitational force of the earth.
Zhao Huan started by discussing Newton's law of universal gravitation. He spoke until his mouth was dry and he had written densely on the blackboard. Then he stopped and said, "That's all for today. Everyone, take note and study it carefully, and explore it in your life."
The audience was not in high spirits. Some of them had frowns on their faces, wondering what they were thinking about, while others looked confused and had no idea what they were saying.
Zhao Huan saw this and consoled them, "Science is difficult. It's a gradual process. Today, I'm mainly trying to free your mind from the shackles. Remember, experiments are the best tools."
"I'll send you the textbooks once I'm done compiling them. There will only be two classes a week. If you have any questions, you can discuss them among yourselves first. If you really don't understand something, tell me and I'll find time to explain it to you."
The class ended like this, the effect was explosive, mainly because the values were shattered.
There is no construction without destruction. If one or two of these people can achieve success in their studies, they will make a lot of money.
Gou worked on science and technology in the Song Dynasty until everyone knew about gravity.
It’s all about force anyway, so how far away is the invention of the steam engine?
Zhao Huan thought, let’s talk about buoyancy in the next class.
Which will fall to the ground first, the gold ingot or the branch?
Li Qingzhao, are you still gambling?
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