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  • j英文字母怎么發(fā)音

    向上移動1米距離所作的功為1焦耳。 1J=1w·s=1A·V·s，即1瓦的機(jī)械工作1秒的釋放的能量為1焦耳，3.6*10^6J=1kwh,即1度，是電的常用單位。 ? 擴(kuò)展資料 J——轉(zhuǎn)動慣量 轉(zhuǎn)動慣量(Moment of Inertia)是剛體繞軸轉(zhuǎn)動時(shí)慣性（回轉(zhuǎn)物體保持其勻速圓周運(yùn)動或靜止的特性）的量度，用字母I或J表示。 在經(jīng)典力學(xué)中，轉(zhuǎn)動慣量（又稱質(zhì)量慣性矩，簡稱慣距）通J是英語中的一個(gè)重要元音字母，但它的發(fā)音似乎比其他字母要稍微復(fù)雜一些。究竟復(fù)雜在哪里呢？一起來看看吧。 ? “j常以I 或J表示，SI 單位為 kg·m2。對于一個(gè)質(zhì)點(diǎn)，I = mr2，其中 m 是其質(zhì)量，r 是質(zhì)點(diǎn)和轉(zhuǎn)軸的垂直距離。 轉(zhuǎn)動慣量在旋轉(zhuǎn)動力學(xué)中的角色相當(dāng)于線性動力學(xué)中的質(zhì)量，可形式地理解為一個(gè)物體對于旋轉(zhuǎn)運(yùn)動的慣性，用于建立角動量、角速度、力矩和角加速度等數(shù)個(gè)量之間的關(guān)系。 ? 以上是為大家介紹的j英文字母怎么發(fā)音的相關(guān)信息，希望對大家有一定的幫助。更多英語相關(guān)信息，可以關(guān)注滬江網(wǎng)查詢。 ? 特別提醒：如果您對英語學(xué)習(xí)感興趣，想要深入學(xué)習(xí)，可以了解滬江網(wǎng)校精品課程，量身定制高效實(shí)用的個(gè)性化學(xué)習(xí)方案，專屬督導(dǎo)全程伴學(xué)，掃一掃領(lǐng)200暢學(xué)卡。

  • 初中英語牛津八年級下07(2)

    初中英語牛津八年級下07(2) Moments later,we were all out of the cage. The crew was hiding among the kangaroos, and I was standing on the bed,beside Gork's head. I said loudly, 'Gork,this is Nobody.' Gork woke up. I aimed the torch at his eye and pressed the button The laser beam hit the eye.The eye went out.

  • 初中英語牛津八年級上06(1)

    初中英語牛津八年級上06(1) kangaroo Captain King, Master Spaceman has been all over space. He often tells his friends stories of his advantures. This is one of them. Peters,our navigator,was lost again. We were running out of food, so towards evening,we landed on an unexplored planet. Lam,our pilot,brought us

  • 初中英語牛津八年級下02(1)

    初中英語牛津八年級下02(1) CHAPTER TWO Reading POLLUTUO FIGHTERS Judy is collecting some facts for a class project on pollution. She is interviewing Doctor Ray,a scientist,about trees. Why are you so interested in trees,Doctor Ray? Dr ray:They're the biggest and oldest living things on earth,Judy. Yes

  • 初中英語牛津八年級下學(xué)期04（2）

    初中英語牛津八年級上學(xué)期04（2） On the abacus in the picture, the beads on the wires represent ones, tens,hundreds and thousands starting from the bottom wire. The picture on the right shows a modern electronic calculator. It can add,subtract, multiply and divide. It can also calculate percentages and square

  • 初中英語牛津八年級下07(1)

    初中英語牛津八年級下07(1) After his supper of kangaroo soup, Gork lay down on his bed and almost immediately fell asleep. He was snoring. The noise shook the cave. 'Listen,everyone,'I said.'Here's my plan.' From my pocket, I took my small, powerful laser torch. Because it was in a plastic case,the magnet

  • 初中英語牛津八年級下06(2)

    初中英語牛津八年級下06(2) You know where that is I hope.'Daisy nodded. 'Well,the Yangtze River carried me to a reservoir. I relaxed there for a few days, and then I travelled a long way and ran into the Huangpu River. Then it was time to get cleaned up.''Cleaned up?'Daisy sounded puzzled.'Yes. I was dirty

  • 初中英語牛津八年級下06(2)

    初中英語牛津八年級下06(2) Gork They looked like kangaroos,giant kangaroos. Following them was a huge monster. It looked almost human except that it had a single,huge,red,glowing eye. The monster turned to close the door and shouted,'Good night,friends.' The friends outside shouted,'Good night, Gork.

  • 初中英語牛津八年級上學(xué)期05（2）

    初中英語牛津八年級上學(xué)期05（2） DIOGENES and DISNEY DIOGENES Diogenes was a famous thinker. He lived in Greece about two thousand years ago. He taught that the way to be happy was to own as few things as possible All he owned was a big jar that he lived in,a coat,a purse and a cup He was very happy. One day,he

  • 初中英語牛津八年級下02

    100 million trees in the next 10 years. [13:03.73]If you want to more about us,please send us an e-mail at info@ . [13:18.28]We hope you will have lots of fun. [13:23.55]From TREES FOR LIFE 更多內(nèi)容請查看《初中英語牛津版八年級匯總專輯》

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