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第52章 回班(1 / 2)

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回到学校的时候,已经是上午了,学校的人倒是不担心林此默这么早出去会有什么意外,毕竟现在都2012年了,更何况,诊所就在对面……

噔噔噔……

转眼7:45,上课了。

晨光透过教室蓝白相间的窗帘,在讲台的粉笔灰上投下菱形光斑,林此默双手插着兜,踩着早读结束的铃声踏入教室时。

此时,正上着物理,

前面的物理老“登”在写题,后排的数学课代表王科正无精打采的用沾着墨水的手指翻动物理练习册,教室中安静之余的纸张摩擦声与铃声的嗡鸣交织成独特的晨间协奏曲。

“都给我看过来啊!”

物理老师抬了抬眼镜,转过身来,露出了用粉笔写的满满当当的题目。

黑板上,摆着一道物理大题——

水平面上,间距为 L ,左端连接一阻值为 R 的电阻,整个装置处于竖直向上的匀强磁场中,磁感应强度为 B 。两根质量均为 m 、电阻不计的导体棒 a 和 b 垂直放置在导轨上。初始时,导体棒 a 以速度 2v_0 向右运动,导体棒 b 以速度 v_0 向左运动。导轨电阻不计,且导体棒与导轨接触良好。求:

1. 最终稳定时导体棒 a 和 b 的速度;

2. 整个过程中电阻 R 上产生的焦耳热。

整体还算好吧,不至于到竞赛地步。

林此默看着,给出了自己的评价,心中也很轻易的模拟题型,速算而出。

班里的竞赛生很多,让他们解去吧。

这题,其实是上周发的模拟卷子的大题,不过,正如刘志远说的,物理老师几乎和林此默同期,也住院了,大概率是因为食物中毒,所以一直没讲。

“侯戟,别躲了,赶紧给我上来!”

地中海的物理老师攥着三角板敲击黑板,金属导轨示意图上的粉笔印被震落几粒碎屑,一嗓子直接吼了下去,可谓是不负“老登”之名,浑厚的嗓音直接惊飞了窗外之鸟,

“别缩在后头装鸵鸟!”

“哦哦。”

随即,教室后排传来噗嗤的笑声,

侯戟哪里敢磨蹭?抓着皱巴巴的试卷便起身,赶紧上去讲了运动鞋在地砖上蹭出刺耳的摩擦音,同时,似是咬牙般的看了一眼林此默。

啊?

林此默微微张嘴,但很快又闭合。

估摸是对方觉得,物理老师叫他是因为自己进来,动静太大。

不过,这好像是真的。

但,班里的人,除了那些中游往下的,其余者对此显然兴致缺缺,倒是有点关心刚回来的林此默。

而后,林此默旁边的一个人悄悄的凑了上来。

“诶,志远,干嘛?”

发现是刘志远后,林此默也稍稍一愣,接着,配合的缓和了一下面部表情。

“你TM的……是不是真被保送清大了?”

刻意压低的声线从左侧传来,刘志远佯装记笔记,钢笔尖却在草稿纸上洇出墨团,一边用余光扫着讲台,一边说着。

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