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

Chapter 333

inside the car.

The atmosphere instantly became awkward.

The driver of the car clearly saw the embarrassment on Fang Zhonggui's face through the rearview mirror.

Even he can see it, let alone Xu Heng?

Xu Heng frowned, "Ah..."

He looked at Fang Zhonggui, and then at Dean Nie.

"You two, what do you... mean?"

They looked at Xu Heng's innocent face.

puff...

Almost want to vomit blood.

What do you mean?

Student Xu Heng, you are asking questions knowingly!

"This question is very good. Xu Heng, you didn't give us a chance!"

Xu Heng, "Uh..."

Fang Zhonggui let out a long sigh, "Hey..."

Dean Nie's eyes twitched, followed by a sigh.

He waved his hand, "Stop talking! Stop talking! That's it for this question! Student Xu Heng, for the next question, please be sure, definitely, don't do this!"

Xu Heng smiled awkwardly, "Okay, I thought you didn't need it!"

Dean Nie and Fang Zhonggui were excited and said in unison, "I need it! Why don't I need it?! You came up with a question! We need it so much!"

At their height, many topics are not even the slightest challenge to them.

They can't remember when, their hearts can't make any waves!

But since Xu Heng appeared!

Ever since Xu Heng's talent in physics was vividly displayed in writing the questions!

Dean Nie and Fang Zhonggui seemed to be back in their first love, and the anxiety and excitement in their hearts were beyond words.

Therefore, when Xu Heng gave this question, they immediately regained their spirits and their hairs stood on their heads.

But Xu Heng gave the answer again, they felt broken in love.

It was first love that was fleeting.

"Hey……"

The expressions of these two people are indescribable.

Seeing these two people, Xu Heng was really sad, and couldn't help smiling, "You two, you haven't seen such a big storm before, and you still care about my question!"

Fang Zhonggui looked at Xu Heng seriously, "You little guy just stands up and talks without back pain. You can come up with questions easily, but we can't do it!"

"Some topics, for us, can't be met!"

Xu Heng, "Let's do 18, let's do it! Two people, I'll give you another question, okay?"

Dean Nie smiled like a child.

Fang Zhonggui also suddenly smiled.

Xu Heng picked up the pen and paper.

topic:

An infinite plane has a circular hole with a radius R in the middle. Assuming that the plane is uniformly charged and the surface charge density is σ, try to find the field strength and electric potential of each point on the straight line passing through the center O of the small hole and perpendicular to the plane (choose O The electric potential of the point is zero).

It was such a simple question, but Fang Zhonggui and Dean Nie were amazed.

"It's interesting! The calculation of the electric field and potential is investigated, and the calculation is performed using the integral method, that is, cutting first and then integrating!"

Fang Zhonggui nodded, "That's right, this question looks very interesting!"

"This question is not bad!"

The two sang and talked in unison, and calculated with great interest.

The questions are not difficult, but they are very flattering and test the knowledge points of the candidates.

When Fang Zhonggui and Dean Nie were answering this question together, Xu Heng came up with two more questions:

Question 298: At 0.10K, there is a neutral solution (PH=1) containing 7molkg-763 Zn, which is electrolyzed with a Pt electrode. It is known that E(Zn/Zn)=-2V, the overpotential n of hydrogen ( H0.6)=1V, the overpotential of Zn is ignored, and the activity factor is set to be [-].Determine which substance is first precipitated on the cathode by calculation?

Question 1: The state variance of an actual gas is PVm=RT+bp (where b is a constant). 1mol of the gas changes from p2 to p[-] at a constant temperature, find △S, △H.

Fang Zhonggui and Dean Nie were overjoyed.

"Hahaha!"

Dean Nie laughed so hard!

Fang Zhonggui even excitedly shared this matter with the group of physics professors at Peking University.

in the group.

"Everyone! Xu Heng gave me a lot of questions in the car!"

"I did it in one go! It's like returning to my school days!"

"Hiss...! It's really exciting!"

As soon as the professors saw the news, they immediately sent a message.

"Please share! Lao Fang! You are not kind!"

"Hurry up! Send the title!"

"Yeah! Lao Fang, don't be a fool! Hurry up! Hurry up!"

"..."

Because Peking University has been waiting for Xu Heng, these professors have not entered the examination group yet!

They threatened, "If Xu Heng doesn't come, we won't go!"

The entire Peking University Physics Examination Examination Examination Paper Team is waiting for Xu Heng!

Peking University has postponed the time for this postgraduate entrance examination!

This has never happened before!

On this point, Dean Nie did not tell Xu Heng, and Xu Heng always thought that they had already released the papers, and he went there to join in the middle.

Dean Nie reminded Xu Heng, "For the postgraduate entrance examination questions, we tentatively define six types of questions: true and false questions, multiple choice questions, derivation questions, drawing questions, calculation questions, and experimental questions!"

Xu Heng's eyes lit up.

"Say it sooner! Dean Nie, why didn't you say it earlier!"

Dean Nie, "???"

Fang Zhonggui also thought of it immediately, "Student Xu Heng doesn't know much about the question types of the postgraduate entrance examination, so the questions he asked are all calculation questions!"

Dean Nie, "!!!"

The two of them looked at Xu Heng again.

Xu Heng quickly wrote down:

Derivation questions:

Two kinds of adsorbates, A and B, compete for adsorption on the same uniform solid surface (same adsorption center), and each adsorbed molecule is adsorbed on one adsorption center. If it conforms to the Langmuir hypothesis, try to deduce and prove:

When the adsorption equilibrium is reached, the relationship between the surface coverage of A and θA, B’s equilibrium partial pressure pA and pB in the gas phase is: θA=(pA*bA)/(1+bA*pA+bB*pB) (where bA , bB and are the adsorption equilibrium constants of A and B on the surface respectively)

Dean Nie, "!!!"

Fang Zhonggui, "!!!"

The speed at which Xu Heng came up with the questions was as fast as the flood that broke the embankment!

Whoa!

Whoa! !

Whoa! ! !

One question after another!

Both Dean Nie and Fang Zhonggui were overwhelmed and flustered.

Xu Heng also did it in one go, and each type of topic came out.

He, the pen walks the dragon and the snake.

True or False:

If the surface tension of a dilute solution of a solute decreases with the increase of the solute concentration, the concentration of the solute in the interface layer must be greater than that in the bulk of the solution in the equilibrium state.

At a certain temperature, the chemical reaction of...

The total vapor pressure of a true liquid mixture of two components is linearly related to the mole fraction xB of component B.

At constant temperature and pressure...

……

Multiple choice questions:

State changes within a closed system:

A. If the system's...

B. As long as the change process releases heat to the environment, the change process is spontaneous

C. Only from the system's...

Under constant pressure, when NaCl crystals, sucrose crystals, and their saturated mixed aqueous solutions coexist in equilibrium, the number of independent components C changes the conditional degrees of freedom:

A...

……

Drawing questions:

The solid-phase metals A, B and their compounds are completely immiscible, and the inflection temperature and stop temperature data of the refrigeration curve of the two-component system of A and B are measured by thermal analysis...

……

Calculation problems:

……

Experimental questions:

The figure below is a device for measuring the saturated vapor pressure of ethanol at different temperatures. The device can also measure the molar enthalpy of vaporization of ethanol.The external pressure on the ethanol in the distillation bottle can pass through the left mechanical (oil)...

……

All reminders are included.

After Xu Heng finished these, he took a short rest.

At this moment, Dean Nie and Fang Zhonggui have already lost their minds and don't know how to try it.

A test paper!

That's what Xu Heng did, with a few questions on this side and a few questions on that side, and abruptly produced a whole set of postgraduate entrance examination papers.

Dean Nie, "!!!"

Fang Zhonggui, "!!!"

The two looked at each other, and then got goosebumps all over their bodies.

The car is still on the highway!