习题11-1.已知质点位矢随时间变化的函数形式为其中为常量.求:(1)质点的轨道(2)速度和速率解:(1) 由知: 消去t可得轨道方程:∴质点的轨道为圆心在(00)处半径为R的圆(2)由有速度:而有速率:1-2.已知质点位矢随时间变化的函数形式为式中的单位为m的单位为s求:(1)质点的轨道(2)从到秒的位移(3)和秒两时刻的速度解:(1)由可知 消去t得轨道方程为:∴质点的轨道为抛物线
西安交通大学出版社《大学物理》答案:第九章 (1) D (2) (1) (2) 2 eV4 等势线是中垂面内半径为x的圆圆心在两电荷连线的中点6 8 00?10-8 Cm2?102 NC?10-8 Cm2?103 NC ?102 V?102 V?102 ?10-5 (1) (2) (
to edit the title text line LevelNinth Level上海交通大学出版社 上海交通大学出版社 第一册应用型研究生英语系列教材A Practical English Course for Postgraduate Students 研究生英语应用教程BackNextUnit FourTable of ContentsReadingSpeakingT
第二册TranslationBack3. sport-utility vehicleA sport-utility vehicle (SUV) is a generic marketing description for a rugged automotive vehicle similar to a station wagon but built on a light-truck chassi
第一册TranslationBackReadingReading — Passage ANextReadingReading — Passage AReadingBack6. Coco ChanelGabrielle Bonheur Coco Chanel (August 19 1883―January 10 1971) was a pioneering French fashion design
第二册TranslationBack5. webinarA webinar is a neologism to describe a specific type of web conference. It is typically one-way from the speaker to the audience with limited audience interaction such as
第二册SpeakingReadingReading — Passage ABackReading — Passage BClick HereBackBackNextIntroductions can be repetitive and its important to maintain the attention of the audience by varying the words y
第二册TranslationBack3. RAM (random-access memory)Random-access memory is a form ofputer data storage. Today it takes the form of integrated circuits that allow the stored data to be accessed in any
第二册TranslationBack3. The Chronicle of Higher EducationThe Chronicle of Higher Education is a newspaper that presents news information and jobs for college and university faculty members and administr
第二册SpeakingReadingReading — Passage ANextReadingReading — Passage ANextReadingReading — Passage memorate: honor memorializebatter: beat strikeupheaval: major change revolutionBack3. private equit
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