Đáp án: Bạn có thắc mắc gì thì hỏi mình nhé
Giải thích các bước giải:
Câu 4
Khoảng cách giữa 2 điện tích là:
`r=sqrt((k|q_1q_2|)/(F.varepsilon))=sqrt((9.10^9 .2.10^(-7).8.10^-7)/(0,2.2))`$\\$`=0,06(m)`
Câu 5
`q_1=q_2=q`
Điện tích của 2 quả cầu là:
`q=±rsqrt((F)/(k))`$\\$`=±0,3sqrt((1,6)/(9.10^9))=±4.10^(-6)(C)`
Trời ơi ai giúp em ik chứ em ngu quá
My hobby 1. My hobby is reading. I read story books, magazines, newspapers and any kind of material that I find it interesting. This hobby got started when I was a little boy. I had always wanted my parents to read fairy tales and other stories to me. Soon they got fed up and tired of having to read to me continually. So as soon as I could, I learned to read. I started with simple ABC books. Soon I could read simple fairy tales and other stories. Now I read just about anything that is available. Reading enables me to learn about so many things that I would otherwise not know. I learned about how people lived in bygone days of magic and mystery. I learned about the wonders of the world, space travel, human achievements, gigantic whales, tiny viruses and other fascinating things of our world. The wonderful thing about reading is that I do not have to learn things the hard way. For example, I do not have to catch a disease to know that it can kill me. I know the danger so I can avoid it. Also I do not have to go deep into the jungle to learn about the tiger. I can read all about it in a book.Books provide the reader with so much information and facts. They have certainly helped me in my daily life. I am better equipped to cope with living. Otherwise I would go about ignorantly learning things the hard way.So I continue to read. Besides being more informed about the world, I also spend my time profitably. It is indeed a good hobby. 1 What is his hobby? …………………………………………………………………………… 2 How does he find reading? ……………………….…………………………………………… 3 When did he start his hobby? ………………………………..…………………………………… 4 Why did his parents get fed up and tired of telling him? ………………………………………………… 5 What did he start reading? ………………………………………………………… 6 What does he read about? …………………………………………………………
alo mọi người ơi, ai rảnh làm giúp em bài này đk?
Chỉ ra phép tu từ có trong đoạn thơ sau: Đã tan tác những bóng thù hắc ám Đã sáng lại trời thu tháng tám Trên đường ta trở lại thủ đô Cờ đỏ bay quanh tóc bạc Bác Hồ
Bài tập về Nguyên tử, mọi người giải câu 6,7, 10, 11 chi tiết giúp mình
Giải hộ mình với ạ đang làm bài tập về nhà
Giúp mình nhanh với: 1,Cho mạch điện như hình vẽ. Biết R1= 2Ω; R2= 4Ω; R3= 6Ω; R4= 12Ω. Tính điện trở toàn mạch khi: a/ K1 ngắt, K2 đóng. b/ K1 đóng, K2 ngắt. c/ Cả 2 khóa đều đóng. d/ Cả 2 khóa đều ngắt 2, Cho mạch điện như hình vẽ. Biết R1= 2Ω; R2 = 3Ω; R3 = 4Ω; R4 = 9Ω. Tính điện trở toàn mạch khi: a/ K ngắt. b/ K đóng.
Read and fill in the blanks with ONE word given in the box. hobby improve when writes because difficult My Favourite Hobby My name is Sara. My favourite _____________(1) is reading. I enjoy reading a book when I am free. I started to do it ______________(2) I was four years old. The first time I did it, I felt interested. So I kept reading. The teachers always taught me to read the difficult words. I was happy when I read a story with a happy ending. I was thrilled when I read a detective story.I enjoy reading ______________(3) I like to explore the imaginative world of my favourite author, J.K. Rowling who _____________(4) “ Harry Potter” . There are a lot of advantages of reading. Reading can make me relaxed and calm. I can also learn new vocabulary items. Then I can further ___________(5) my English. Moreover, it can give me an unlimited imagination, so I can write books in the future. I can learn the different cultures and customs of other countries in the world too.I read at least one hour every day. I read books by myself. I usually read it at home. I wish I could read different kinds of books because it might be very challenging.
Khoanh câu đúng giúp mình......
Verbs form 1. If you (be) at home, will you play games online? 2. They (help) us if they had money 3. Unless it (rain), we would go out 4. If I did not do my homework, the teacher (punish) me 5. If he plays sports, he (be) healthier 6. If I (not have) your address, I (not go) to your house
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