Just when Huo Baizhan was speechless for a while, Jiang Xiaoqian said 'calmly' again.

"I'm not drunk, I don't need to take medicine, right?" Even though she pretended to speak calmly and calmly to prove that she was not drunk, but at this time, the two were too close, and Huo Baizhan could faintly smell the aroma of wine on her, as well as ......

He lowered his eyes slightly, looking at Jiang Xiaoqian up close, he could clearly see his reflection from the reddened eyes at the corners of her eyes, her skin was so white that it seemed to glow under the light, just like those so-called white to glow, there is a basis.

When drunk, it turns red, and the fine fluff is clearly visible at such a close distance, like a ripe peach, and I want to eat it......

He couldn't help but reach out and pinch it, and couldn't help but sigh in his heart: It feels so good!

Jiang Xiaoqian frowned, a little disgusted and wanted to dodge, but he had to be obedient, "Huh? Is it OK to skip pills? ”

A faint smile flashed in the man's eyes, and he rubbed her cheek with his fingers recklessly, and followed the temptation: "Of course you don't need to take medicine if you're not drunk, but you have to prove that you're not drunk, right?" ”

"Uh-huh!" Jiang Xiaoqian nodded quickly, and a little derpy hair was upside down.

Huo Baizhan smiled secretly, stretched out his hand to press down the stupid hair, his voice was low and magnetic, and patiently coaxed the child: "How do you prove that you are not drunk, I will make a simple question, if you can answer it, don't take medicine, okay?" ”

Jiang Xiaoqian's eyes lit up, and he suddenly looked at him like a rabbit with pricked up ears, and nodded seriously: "Hmm!" ”

The man chuckled, and his playful eyes were faint: "Ask, a raindrop with a mass of m, descends from a high altitude due to gravity and evaporates at a uniform speed on the way down, set the evaporation speed to v, regardless of air resistance, ask when the raindrop kinetic energy is the largest?"

After listening to the question, Jiang Xiaoqian was completely stunned, opened her mouth slightly, Huo Baizhan could see the tip of her little tongue from this angle, and her eyes darkened.

"It's not fair!" The girl quickly reacted and said hurriedly, "You obviously said that it was a simple question, where is this topic simple, you lied to me!" ”

Huo Baizhan looked at him, the tip of his tongue against his teeth, hissing, and his reaction was quite fast, but it didn't matter.

He immediately said calmly: "Let the maximum kinetic energy of the raindrop be in t seconds, then the mass of the raindrop at this time is (m-vt) and the velocity is gt, so the kinetic energy is."

W(t)=0.5(m-vt)(gt)(gt)

W(t)'=0 yields:

[0.5(m-vt)(gt)(gt)]'=mg^2t-1.5vg^2t^2=0

t1=0 t2=2m/(3v)

W(t1)"=mg^2>0 is the minimum and is omitted

W(t2)"=mg^2-3vg^2<0 is the maximum

Answer: The kinetic energy is maximum at 2m/(3V). ”

After he finished speaking unhurriedly, he looked at the girl with a funny look, so well-behaved, I really wanted to bully ......

Who knew that it would be too hard to bully all of a sudden, and the girl was stunned all of a sudden, bowing her head and retracting from the bed, and crying softly that she was too stupid.

What about the Mary Sue heroine, why didn't she even solve a simple question, why did she ......

Huo Baizhan looked down at the top of her furry hair, helpless and funny, what is there to collapse about?

He had to coax slowly, first arresting people again, "Okay, such a simple question, there's nothing to be ashamed of if you can't solve it, continue to work hard next time." ”

Jiang Xiaoqian: "Woo woo! "She doesn't want a next time!

Looking at the sister-in-law who was crying even more sadly, Huo Baizhan couldn't bear it, thought about it, and said: "Forget it, then I'll give you another chance, as long as you do what I say, I'll let you go." ”

Jiang Xiaoqian looked over all of a sudden, looking at the man pitifully with crystal teardrop eyes, as if to say: Really, don't lie to me.

Huo Baizhan didn't speak, he stretched out a hand, blocked her eyes, and then ......