Giải thích các bước giải:
`h=8m`
`t=30s`
`F=180N`
_____________________
`A=?J`
`P=?W`
Công của người đó đã thực hiện:
`A=F.h=180.8=1440` `(J)`
Công suất của người kéo một vật từ giếng lên:
`P=A/t=1440/30=48` `(W)`
Đáp án:
`1440J`
`48W`
-------------
Công của người kéo là:
`A=P.h=F.h=180.8=1440J`
Công suất của người kéo là:
`P=A/t=1440/30=48W`
Vẽ đậu mầm cầm giao nha😱😱 Nl: không phạm luận nha :)
Viết lại câu 14. Minh said “I don’t know where Nga is now” → Minh said 18. They were cleaning their room at 8 o’clock last Sunday. → Their room 19. They didn’t take him to the zoo last Sunday. → He 21. I am reading an interesting book in my bedroom . → An interesting book 22.Mr. Brown can translate this novel into French. → This novel
1. A(n) ___ family is a living group of Grandparents, parents and children. 2. Mary ‘s mother is said to be a very ___ woman because she takes responsibility for running the househoud 3. It is __ for us to live in a small and dirty house. 4.Being members in a close-knit family we should be very __ of one another. 5.In the family, the woman is both a mother and a(n)__
Giúp mình với ạ ! Mình cảm ơn! Vẽ hình hộ mình ạ !
. Choose the best answer 16. Do you mind if Lan ................ that book away ? a. take b. taked c. takes d. took 17. Would you mind ................. the door ? a. open b. opening c. opened d. opens 18.It ..................... raining an hour ago . a. start b. started c. has started d. starts 19. I ..................... in Danang several years . a. lives b. lived c. have lived d. has lived 20. We .................. Tom and Mary since last TET holiday . a. don’t see b. didn’t see c. hasn’t d. haven’t seen
giải hộ mình với nha cảm ơn bạn
: PASSIVE VOICE Many people learn Chinese today.
Exercise 1: Complete the sentences. Use the information in the box and the modal verb in parenthese. [ quit it at once; be very happy;leave the building in order; be very worried; come to visit me more; understand the lectures well ]
Choose the best answer 11. The liquid ....................... into new glassware a. is blown b. blew c. is blowing d. are blown 12. The empty bottles ...................... and ............. the factories for recycling . a. collected – sent b. collected – are sen c. are collected – sent d. collect – send 13. We are ready ................. the environment . a. clean b. cleaned c. cleaning d. to clean 14. Shoes ...................... from old tires to safe money . a. is made b. are made c. is making d. will make 15. We should study English better so as ............a good job . a. get b. will get c. to get d. getting
Choose the best answer 6. To prepare for the new year , I .................. my house again since last month . a. paint b. painted c. have painted d.has painted 7. The used plastic bottles ................... with water several times yesterday. a. washed b. is washed c. are washed d. were washed 8. It is dangerous ............. quickly in the Tet holiday . a. driving b. drove c. to drive d. driven 9. I am ............... that you passed your English exam . a. please b. happily c. happy d. friendly 10. I am looking forward to ................... you on next Sunday . a. meetingb. meet c. met d. will meet
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