Xueba, I beg you to go and escort him quickly!

Page 215

Although there is a little less learning in the real sense, there is still a lot of learning in other aspects.

"No, no, no! I'm going to get up and study! I have to go to school tomorrow morning!"

At noon, Yue Pingting got up and got dressed.

Just got out of the room.

"Boom!!!——"

"Boom boom boom!"

"Open the door! It's broad daylight, what kind of door do you open at home?"

It was Zhou Xiu'e and Xu Yueshan who came back from their trip.

Yue Pingting almost died of fright.

"!!!"

"Auntie, uncle, you are back!"

With a guilty conscience, she didn't dare to look directly into their eyes, and went to open the door.

Zhou Xiu'e and Xu Yueshan were in a very happy mood.

"Where's Xu Heng? Haven't gotten up yet? This guy, is he lying in bed?"

"Xiao Yuezi, you can't spoil him like this!"

Yue Pingting quickly explained, "Get up! Xu Heng is up!"

After Xu Yueshan came in, he saw the tobacco, wine and some gifts in the room, and was confused.

"Maotai? Where did this come from! Son! What's going on here?"

"So much wine! Are you going to rob someone's Moutai shop?"

"Hiss! Cellaring! Decades of cellaring! This will cost thousands, or even tens of thousands of bottles!"

As soon as these words came out, both Zhou Xiu'e and Yue Pingting were stunned.

Yue Pingting even said bluntly, "Is this wine so expensive? Didn't the boss Han say that he bought rice paper as a gift?"

Xu Yueshan, "???"

"Buying rice paper? Buying rice paper with gold on it won't give you wine like this!"

"Xiao Yuezi, what's going on?"

Yue Pingting told about Xu Heng's painting for Wen Ruohuai.

Zhou Xiu'e, "Hiss..."

Xu Yueshan, "Hiss..."

At this time, Xu Heng came out of the room.

"Parents? Parents? Parents! Why are you all stunned?"

brush!

The two looked at Xu Heng suddenly, their eyes filled with shock.

……

PS: Recommend a book from the boss [Live from Ocean Global Leisurely]

Thanks to 【Nuo*5】【一点点】【tail number 3003】【Yanyue】【tail number 2547】for your support!

Kneel for all support! ! !There will be updates later!three.

Chapter 147

"Xu Heng! These are all given by Boss Han?"

Xu Heng said indifferently, "Aren't you used to it yet?"

Zhou Xiu'e and Xu Yueshan opened and closed their mouths, not knowing what to say for a moment.

Xu Yueshan's eyes wandered between the wine and Xu Heng.

He especially valued these wines.

Zhou Xiu'e squatted down, picked up a bottle, and looked at it carefully.

"Is this Moutai? Real Moutai? Thousands of dollars a bottle?"

Xu Heng, "Almost."

Xu Yueshan, "There may be a better price!"

Zhou Xiu'e, "!!!"

Yue Pingting, "Are these wines so expensive?"

Looking at Xu Heng, she couldn't help but stare, "Why didn't you say it earlier!"

"I'm so ashamed! I also said, how much rice paper do I have to buy to give away so much wine..."

And this sentence was said in front of others!

Yue Pingting really wanted to find a mouse hole to slip into!

Xu Heng, "Since you're back, we won't buy food! Let's go and study."

He took Yue Pingting back to the room and handed it over to Zhou Xiu'e and Xu Yueshan.

Yue Pingting, "???"

Xu Heng, "They went home happily, so let them do their work and let us take it easy."

Yue Pingting nodded and smirked.

She turned on the computer, began to look for questions, and brushed them up.

Brush and brush!

Xu Heng watched, "Stop, do this question."

The diving bell is a kind of underwater life-saving equipment. It is a container with an open bottom and a closed top, similar in shape to a bell.When the diving bell is underwater, there is air in the space above the interior to meet the needs of divers for underwater escape.

For the convenience of calculation, the diving bell is simplified as a cylinder with a cross-sectional area of S, a height of h, and an opening downward. .

It is known that the density of water is ρ, the acceleration of gravity is g, and the atmospheric pressure is p0, Hh, and the change of temperature and the change of water density with depth are ignored.

(1) Find the height l of the water entering the cylinder;

(2) Keep H constant, press in air to discharge all the water in the cylinder, find the volume of the pressed air when its pressure is p0.

Yue Pingting, "???"

"Xu Heng, are you sure? This is a national college entrance examination question? You asked me to do the college entrance examination question?"

Xu Heng wasn't joking. From his observation, Yue Pingting had already understood a lot of topics, and it was nothing but a waste of time to find the corresponding topics to do step by step.

Xu Heng, "Try to do it yourself, and when you're done, show me."

"I'll give you half an hour."

Yue Pingting looked at Xu Heng with resentment.

Xu Heng rolled his eyes, "It's useless to complain, hurry up and read the questions, you still have 29 minutes and 43 seconds... 42... 41..."

Yue Pingting immediately shrank her neck and answered the question seriously.

She fetched straw paper and a pen.

Write and draw on it.

She is not like Xu Heng, who can do mental calculations directly!

After tossing for a while, Yue Pingting reluctantly tried to answer the question.

She frowned the whole time.

Because there are no numbers in this question, they are all represented by letters.

solution:

When the diving bell is above the water surface and when it is placed underwater, the volumes of the gas in the cylinder are V0 and V1 respectively, and the pressure of the gas in the cylinder after it is placed underwater is P1, according to Boyle's law and the conditions given in the title:

P1V1=P0V0、V0=hS、V1=（h-l）S、P1=……

……

Finally got the answer:

l=((ρgh)/(p0+ρgh))h, V=ρgSHh/P0

Xu Heng took a rough look at the problem-solving ideas and answers.

Yue Pingting's heart raised her throat, and she stared at Xu Heng.

right?

Still not right?

Seeing Xu Heng nodded slightly, Yue Pingting breathed a sigh of relief!

I secretly said "yeah" twice in my heart!

Xu Heng put down the straw paper and rubbed Yue Pingting's head, "Being smarter and smarter!"

Yue Pingting was bursting with confidence!