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高中物理网课哪个老师的课好

发布时间:2021-05-21 来源:简单网校 发布人:tusya

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麻雪玲:简单学习网明星教师。原北京市英语优秀教师、骨干教师。英语专业八级,十多年教学经验,深受学生喜爱的人气女神教师。

条理清晰,逻辑性强,方法独特,幽默风趣。

简单学习网高高中习资料

动力学(运动和力)

1.牛顿第一运动定律(惯性定律):物体具有惯性,总保持匀速直线运动状态或静止状态,直到有外力迫使它改变这种状态为止

2.牛顿第二运动定律:F合=ma或a=F合/ma{由合外力决定,与合外力方向一致}

3.牛顿第三运动定律:F=-F′{负号表示方向相反,F、F′各自作用在对方,平衡力与作用力反作用力区别,实际应用:反冲运动}

4.共点力的平衡F合=0,推广{正交分解法、三力汇交原理}

5.超重:FN>G,失重:FN

6.牛顿运动定律的适用条件:适用于解决低速运动问题,适用于宏观物体,不适用于处理高速问题,不适用于微观粒子

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母亲节英语作文:母亲节_1200字

A little boy invited his mother to attend his elementaryschool’sfirst teacher-parent conference. To the little boy sdismay, shesaid she would go. This would be the first time that hisclassmatesand teacher met his mother and he was embarrassed byherappearance. Although she was a beautiful woman, there was aseverescar that covered nearly the entire center side of her face.The boynever wanted to talk about why or how she got the scar.

At the conference, the people were impressed by the kindnessandnatural beauty of his mother despite the scar, but the littleboywas still embarrassed and hid himself from everyone. Hedid,however, get within earshot of a conversation between hismotherand his teacher, and heard them speaking.

How did you get the scar on your face? the teacher asked.

The mother replied, When my son was a baby, he was in a roomthatcaught on fire . Everyone was too afraid to go in because thefirewas out of control, so I went in. As I was running toward hiscrib ,I saw a beam coming down and I placed myself over him tryingtoprotect him. I was knocked unconscious but fortunately, afiremancame in and saved both of us. She touched the burned sideof herface. This scar will be permanent 8, but to this day, Ihave neverregretted doing what I did.

At this point, the little boy came out running towards hismotherwith tears in his eyes. He hugged her and felt anoverwhelmingsense of the sacrifice that his mother had made forhim. He heldher hand tightly for the rest of the day.

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