Chapter 103 Physics in the fog
Jiang Yong came and went in a hurry.
Jiang Weiguo did not want to make any comment on this.
The same goes for his third brother. Whatever his son wants to eat, he can do it as long as it is not outrageous. If it is too outrageous, he will keep making noises and beating him.
When Jiang Jianguo was a child, someone told him that he must eat boiled cabbage. After causing trouble for two days, Jiang Weiguo beat him up and cut onions and peppers for two days as a punishment. The effect of killing chickens to scare monkeys was quite good.
Jiang Weiguo is making trouble.
He had been busy since early in the morning. He slaughtered the fattest old hen raised by Grandma Jiang, and even processed other ingredients while staying next to the pot of soup.
Jiang Feng ate another small piece of Sanbui and then called others to come over to eat. The two sisters Jiang Junqing and Jiang Junlian were the fastest. Each of them scooped two big spoons and then stood up. At the end of the meal, was there any left? A quarter was left to Jiang Jianguo's five brothers.
"Grandpa, this is delicious. Can you make this tomorrow?" Jiang Junqing's eyes lit up.
"You and I learn how to cook for a few years without learning knife skills and focus on cooking. In a few years, you can make it yourself." Jiang Weiguo said.
Jiang Junqing suddenly became silent.
Among Jiang Weiguo's grandchildren, she was the best at cheating. She cut her hand when cutting vegetables for the first time and stopped learning even after a few drops of blood were squeezed out.
Fortunately, she was Jiang Weiguo's granddaughter and not his daughter, otherwise she would have been hung up and beaten.
"Okay, okay, everyone, go out and don't be an eyesore in the kitchen." The old man started to yell at people.
A group of annoying grandchildren were kicked out just like that.
Everyone was about to go back to their respective houses to find their mothers, when Jiang Junqing and Jiang Junlian stopped their four brothers and looked at them pitifully.
"We won't be doing our winter vacation homework." The two sisters said in unison.
Jiang Zaide shuddered and was the first to leave: "I can't do it. I've already worked and forgotten all the stuff in junior high school. I'm looking for you, Brother Cheng. He was among the top 20 in the city with more than 660 points in the college entrance examination. Look for him! He Good results! I have to go back to the house and revise the design.”
"I can't do it either. I got 660 in the college entrance examination and only 600 in the high school entrance examination. I didn't do well in junior high school. I've already forgotten about junior high school after I've already graduated. I'm looking for you, Brother Ran!" After saying that, Jiang Shoucheng disappeared in a flash. .
Jiang Ran immediately panicked and hurriedly blamed me: "I can't do it either. I got 660 in the high school entrance examination but I didn't get 600 in the college entrance examination! If I want to teach you, I will be a waste of others, and I will delay you because I have not laid a good foundation." High school development in the future Besides, I have forgotten all the things I studied in finance. If I can’t do it, look for your fourth brother. He majors in physics and mathematics. He can definitely do it! His college entrance examination scores are higher than mine. Strong!”
Jiang Feng:?
"Isn't that Juan Qing bad at physics? Your brother Xiao Feng specializes in physics, so you asked him if he's okay!" Jiang Ran slipped away after a clever move to blame.
"Brother." Jiang Junqing and Jiang Junlian both looked at Jiang Feng.
Jiang Feng:...
Don't act cute, you are almost heavier than me.
However, Jiang Junqing and Jiang Junlian were in the third grade of junior high school, and their studies had indeed reached a critical stage. They would take the high school entrance examination in June. Since they were determined to study, Jiang Feng could not stop teaching.
Entering the room with them, Jiang Feng saw a familiar book on the table.
The blue physics "5-Year High School Entrance Examination 3-Year Simulation", with its shining white and yellow characters, demonstrates its unshakable status in teaching aid materials for so many years.
"Brother, don't worry. It's not difficult. It's a question for the second grade of junior high school." Jiang Junqing comforted him and opened the book.
Jiang Feng immediately felt relieved when he heard it. It's second grade physics. It's very simple for just getting started.
Then take a closer look.
2. As shown in the picture, place a piece of ice in a beaker filled with water. The lower surface of the ice cube is in contact with the bottom of the cup. The water surface is just in line with the mouth of the cup. Regarding whether water will overflow when the ice melts, the following judgment is correct. is()
A. When the lower surface of the ice cube exerts pressure on the bottom of the cup, the water will definitely overflow after the ice melts
B. When the lower surface of the ice cube exerts pressure on the bottom of the cup, the water will not overflow after the ice melts
C. Regardless of whether there is pressure on the bottom of the cup from the lower surface of the ice cube. When the ice melts, water will overflow
D. Regardless of whether there is pressure on the bottom of the cup from the lower surface of the ice cube. No water will spill out after the ice melts
Jiang Feng:?
Isn't this picture a bit abstract?
Forget it, let’s look at the next question.
8. As shown in Figure A, an object weighing 80N makes a uniform linear motion horizontally to the right at a speed of 0.4m/s on the horizontal plane under the action of a horizontal leftward pulling force F1 of 30N. Then use the pulley set shown in Figure B to pull the object. Under the action of the horizontal pull force F2 to the right, the object moved 0.5m in a straight line to the right at the same speed on the same horizontal plane (the mass of the pulley and the rope and the pulley and the rope) The friction of the rope is not included). Which of the following statements is correct()
A. The friction force between the object and the horizontal surface is 15N
B. The power of pull force F2 is 36W
C. The magnitude of the pulling force F2 is 90N
D. The work done by the pulling force F2 is 15J
Jiang Feng: Hey, I know this question.
Jiang Feng started speaking confidently.
Five minutes later——
Jiang Junqing and Jiang Junliangu looked at Jiang Feng in confusion.
Jiang Feng:...
Didn't he speak clearly enough just now?
Don't you understand this?
"Forget it, little brother, let's talk about the previous question." Jiang Junlian tried to help Jiang Feng resolve the embarrassment.
Jiang Feng:...
"Ahem, um, ah." Jiang Feng tried to show his embarrassment by joking, "This kind of question is not even tested in the high school entrance examination."
Jiang Feng received two suspicious looks.
"That's not right, little brother, there is such a question in the mock paper for the high school entrance examination we made." Jiang Junqing didn't believe it.
"Ah, I didn't pass the high school entrance examination back then!" Jiang Feng has long forgotten what he took in the high school entrance examination that year. He just didn't take the high school entrance examination and there's nothing wrong with him.
"You guys, it's been several years since I took the high school entrance exam. Maybe it's been reformed now. Let's change it to another one, math. How about math?" Jiang Feng laughed.
Jiang Junlian took out a green May 3 mathematics book.
The green color moved Jiang Feng very much.
He knows all junior high school mathematics!
Not only can he speak mathematics better than physics, he helped Chen Xiuxiu with mathematics every day in high school!
After tutoring two cousins in mathematics for half a morning, Jiang Feng deeply understood the hardships of the junior high school teachers back then. That feeling is, how come you don’t know this, how come you can’t do this, how did you get to the third grade of junior high school, and how come you can’t do it anymore as I just talked about almost everything.
As expected, tutoring requires distant friends and close friends. If you get close to the teacher, you can't help but want to hit them with a book.
Jiang Feng then thought about it, there were two of them, and the twins had a tacit understanding. If they joined forces, they might not be able to win, so he could only put down the book in his hand.
Forget it, I won't be beaten for a while, and I will take a step back to avoid going to the hospital.
We eat dumplings and yesterday's leftovers for lunch. Everyone knows that tomorrow will be the most sumptuous meal of the year, and they don't care. If you eat less today and get hungry, the meal will be more delicious tomorrow.
If you eat one less bite today, you can eat one more bite tomorrow. Rounding it all off is a bite earned.
Jiang Feng walked to Jiang Zaide with a bowl in hand and complained to his cousin: "Juan Qing and Juan Lian's foundations are too poor. Logically speaking, shouldn't the education in City A be better than that in City Z?"
"The two of them are used to sneaking around and playing around." Jiang Zaide took a dumpling in his mouth. "We used to hang sandbags for a few days and then we were lazy and idle. When practicing knife skills, we cut everything. After cutting for two hours, we said My hands are sore and I cut my hands, so I won’t do it anymore.”
"Both of them, Juan Lian is a bit better, but Juan Qing cut off his hand once and then started arguing and stopped learning. Fortunately, they were born later and younger. Grandpa's temper is much better than before. He was a big talker earlier. It’s not like we went through hardships when we were learning how to cook, so they know how good it is to study.”
Jiang Feng:? ? ?
Seeing Jiang Feng's surprised face, Jiang Zaide reacted: "Oh, yes, I forgot. Among our brothers, you are the most honest. You didn't yell or cry even when your hand was cut. You even kept practicing after wrapping up a gauze bag."
"Grandpa doesn't care if you cry." Jiang Feng said that it's not like he never cried.
"I don't care, just keep crying. As long as you cry long enough, grandpa will be soft-hearted and won't let you practice." Jiang Zaide said.
Jiang Feng:? ? ?
And this operation.
"Hey, Xiaofeng, I'm not talking about you, you are the most honest among our brothers." Jiang Zaide said earnestly.
Jiang Feng:...
oh.
We honest people have done something wrong.
The honest man's lies are even intermediate!
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(End of chapter)