Giúp mình nha!
PII=V...
PI=V...
P.P=V...
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23 tháng 12 2021 lúc 15:21
Task 2: Complete the following sentences in Active form, and then write passive sentences: (Present perfect)S + have/has + V(pII) + O à S + have/has been + V(pII) + by O1. The earthquake (destroy) _______________ many buildings recently._________________________________________________________________________2. Someone (just break) _______________ into our house._________________________________________________________________________3. They (not plant) _______________ trees yet._...
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Task 2: Complete the following sentences in Active form, and then write passive sentences: (Present perfect)
S + have/has + V(pII) + O à S + have/has been + V(pII) + by O
1. The earthquake (destroy) _______________ many buildings recently.
=>_________________________________________________________________________
2. Someone (just break) _______________ into our house.
=>_________________________________________________________________________
3. They (not plant) _______________ trees yet.
=>_________________________________________________________________________
Task 2: Complete the following sentences in Active form, and then write passive sentences: (Present perfect)S + have/has + V(pII) + O à S + have/has been + V(pII) + by O1. The earthquake (destroy) _______________ many buildings recently._________________________________________________________________________2. Someone (just break) _______________ into our house._________________________________________________________________________3. They (not plant) _______________ trees yet._...
Đọc tiếp
Task 2: Complete the following sentences in Active form, and then write passive sentences: (Present perfect)
S + have/has + V(pII) + O à S + have/has been + V(pII) + by O
1. The earthquake (destroy) _______________ many buildings recently.
=>_________________________________________________________________________
2. Someone (just break) _______________ into our house.
=>_________________________________________________________________________
3. They (not plant) _______________ trees yet.
=>_________________________________________________________________________
ứng với pha dao động pi/3 rad, gia tốc của 1 vật dao động điều hòa có giá trị a=-30m/s^2. tần số dao động là 5 Hz. lấy pi^2=10. li độ và vận tốc của vật là.
đáp án x=3cm, v=-30picăn3 cm/s
mình giải ra x=6cm, v vẫn vậy. mong bạn chỉ giúp mình
+ Gia tốc: \(a=-\omega^2x\Rightarrow x=-\frac{a}{\omega^2}=-\frac{-3000}{\left(10\pi\right)^2}=3cm\)
+ Ta có: \(x=A.\cos\left(\frac{\pi}{3}\right)=3\Rightarrow A=6cm\)
+ Vận tốc: \(v=-\omega A\sin\varphi=-10\pi.6.\sin\frac{\pi}{3}-30\sqrt{3}\pi\left(\frac{cm}{s}\right)\)
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ok mình hiểu r. tại cứ nhầm x là A nên tính ra =6
cảm ơn bạn nhé.
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ai giúp mik với, mik cần gấpI. PRESENT SIMPLE: S + V(s/es) + O S + am / is / are + PII + by O1. People grow rice in India…à………………………………………………………2. They make this computer in USA à ……………………………………………..3. People make cheese from milk.à ………………………………………………..4. We paint the house every year. à ………………………………………………..5. We clean the garage every week.à ………………………………………………6. We export coffee to 20 countries. à ……………………………………………..7. We import tea...
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ai giúp mik với, mik cần gấp
I. PRESENT SIMPLE: S + V(s/es) + O => S + am / is / are + PII + by O
1. People grow rice in India…à………………………………………………………
2. They make this computer in USA à ……………………………………………..
3. People make cheese from milk.à ………………………………………………..
4. We paint the house every year. à ………………………………………………..
5. We clean the garage every week.à ………………………………………………
6. We export coffee to 20 countries. à ……………………………………………..
7. We import tea from Brazil. à ……………………………………………………...
8. People speak English every where.à ……………………………………………
9. They don’t make cars here. à ……………………………………………………
10. They feed the monkeys twice a day.à ………………………………………….
II. PRESENT SIMPLE : ACTIVE OR PASSIVE
1. The cows (milk)………..… every day. My mother (milk) ….. them twice a day
2. Tea (grow ) ……………….. in Moc Chau and Thai Nguyen.
3. These bikes ( make ) …………………………….in Viet nam.
4. People ( grow ) …………………….rubber trees in South of Vietnam.
5. I like those shoes. They ( make ) ……………………….. of leather.
6.
|
We ( work ) ……………….on my grandparents’ farm in our school holiday.
III. PAST SIMPLE:
1. Tolstoy wrote “ War and Peace ”.à ………………………………………………..
2. Hemingway didn’t write “ Hamlet ”à ……………………………………………….
3. Someone built that house in 1930.à ………………………………………………
4. Bob Smith built this house. à ………………………………………………………
5. We invited 50 people to the party.à ……………………………………………….
6. They open the factory at 9 o’clock.à ………………………………………………
7. They posted all the letters yesterday.à …………………………………………..
8. James Watt invented the steam engine.à ……………………………………….
9. Columbus discovered America in 1490.à ………………………………………..
10. People finished building Thang Long Bridge in 1985.à …………………………
IV. PRESENT SIMPLE or . PAST SIMPLE: ACTIVE OR PASSIVE
1. Yesterday our teacher ( arrive) …………… five minutes late.
2. That morning newspaper (read) …………… by over 200,000 people everyday
3. That’s not my coat. It ( belong) …………………….to Linda.
4. A bad accident ( happen) ……………………in Regent Street last night.
5. When I ( arrive) ……………at the air port yesterday, I ( meet ) ……………… by my family.
6. A new school ( build ) ……………………….. in our village last month.
Peter ( do) ……………this work last month. That one ( do) …………….by Tom.
1. Rice is grew in India.
2. This computer is made in USA.
3. Cheese is made from milk.
4. The house is painted every year.
5. The garage is cleaned every week.
6. Coffee is exported to 20 countries.
7. Tea is imported from Brazil.
8. English is spoken everywhere.
9. Cars are not made here.
10. The monkeys are fed twice a day.
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III. PAST SIMPLE:
1. Tolstoy wrote “ War and Peace ”. => " War and Peace " was written by Tolstoy………………………………………………..
2. Hemingway didn’t write “ Hamlet ” => " Hamlet " didn't written by
Hemingway…………………………………………….
3. Someone built that house in 1930.=> That house was built in 1930………………………………………………
4. Bob Smith built this house. => This house was built by Bob Smith………………………………………………………
5. We invited 50 people to the party.=> 50 people were invited to the party……………………………………………….
6. They open the factory at 9 o’clock.=> The factory was opened at 9 o'clock ………………………………………………
7. They posted all the letters yesterday. => The letters were posted yesterday…………………………………………..
8. James Watt invented the steam engine.=> The steam engine was invited by James Watt……………………………………….
9. Columbus discovered America in 1490.=> America was discovered in 1490 ………………………………………..
10. People finished building Thang Long Bridge in 1985.=> Building Thang Long Bridge was finished in 1985 …………………………
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23 tháng 12 2021 lúc 15:25
Task 3: Complete the following sentences in Active form, and then write passive sentences: (Past simple)S + V-ed + O à S + was/were + V(pII) by O1. They (fire) _______________ him last week._________________________________________________________________________2. A stranger (gave) _______________ me a nice present yesterday._________________________________________________________________________3. The teacher (not allow) _______________ us to leave._____________________________...
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Task 3: Complete the following sentences in Active form, and then write passive sentences: (Past simple)
S + V-ed + O à S + was/were + V(pII) by O
1. They (fire) _______________ him last week.
=>_________________________________________________________________________
2. A stranger (gave) _______________ me a nice present yesterday.
=>_________________________________________________________________________
3. The teacher (not allow) _______________ us to leave.
=>_________________________________________________________________________
Này là dùng ving hoặc to V nha. Giúp mình với nha:(((
1 to start
2 wash - go - to play
3 stay
4 making
5 stay
6 to train
7 to know
8 to smoke
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23 tháng 12 2021 lúc 15:12
Task 1: Complete the following sentences in Active form, and then write passive sentences: (Present continuous)S + is/am/are + V-ing + O à S + is/am/are + being + V(pII) by O1. Helen (visit) _______________ the museum now.è ________________________________________________________________________2. We (use) _______________ the computer at the moment.è ________________________________________________________________________3. I (fix) _______...
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Task 1: Complete the following sentences in Active form, and then write passive sentences: (Present continuous)
S + is/am/are + V-ing + O à S + is/am/are + being + V(pII) by O
1. Helen (visit) _______________ the museum now.
è ________________________________________________________________________
2. We (use) _______________ the computer at the moment.
è ________________________________________________________________________
3. I (fix) _______________ my bike right now.
è ________________________________________________________________________
1. Helen (visit) __is visiting_____________ the museum now.
è _____The museum is being visited by Helen now_____
2. We (use) ___are using____________ the computer at the moment.
è ___The computer is being used by them at the moment___________
3. I (fix) _____am fixing__________ my bike right now.
è _______My bike is being fixed by me right now_________________
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đoạn mạch xoay chiều gồm điện trở cuộn dây thuần cảm và tụ điện mắc nối tiếp. Đặt vào hai đầu đoạn mạch một điện áp có dạng u 400√2cos(100πt) V . Mắc các vôn kế lần lượt vào các dụng cụ trên theo thứ tự V1, V2, V3. Biết V 1 và V 3 chỉ 200V và dòng điện tức thời qua mạch cùng pha so với điện áp hai đầu đoạn mạch trên. Biểu thức u2 là?
A. 200√2 cos(100πt + π/2) V
B. 400 cos(100πt - π/4) V
C. 400 cos(100πt + π/4) V
D. 400 cos(100πt ) V
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đoạn mạch xoay chiều gồm điện trở cuộn dây thuần cảm và tụ điện mắc nối tiếp. Đặt vào hai đầu đoạn mạch một điện áp có dạng u = 400√2cos(100πt) V . Mắc các vôn kế lần lượt vào các dụng cụ trên theo thứ tự V1, V2, V3. Biết V 1 và V 3 chỉ 200V và dòng điện tức thời qua mạch cùng pha so với điện áp hai đầu đoạn mạch trên. Biểu thức u2 là?
A. 200√2 cos(100πt + π/2) V
B. 400 cos(100πt - π/4) V
C. 400 cos(100πt + π/4) V
D. 400 cos(100πt ) V
7 tháng 4 2022 lúc 19:58
nung nóng 15,8 g KMnO4 thu được V lít khí O2
a) lập pthh
b) tính V
mong các bạn làm giúp mình nha!
nKMnO4 = 15,8 : 158 =0,1 (mol)
pthh : 2KMnO4 –t-> K2MnO4 +MnO2+O2
0,1 0,05
=>V=VO2 =0,05 . 22,4=1.12(l)
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