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10 tháng 10 2018
bạn ơi google để làm gì
lên google mà kiểm tra nha bạn
hok tốt
ủng hộ k nha
love
LL
0
ai gải hộ mk vs cần gấp ạ
RY
9 tháng 11 2017
câu 1:
a) R= \(\rho.\dfrac{l}{S}\)= \(1,1\times10^{-6}\times\dfrac{5}{0,068\times10^{-6}}\)= \(\dfrac{1375}{17}\)( Ω)
b) P= \(\dfrac{U^2}{R}=\dfrac{220^2}{\dfrac{1375}{17}}=\dfrac{2992}{5}\left(W\right)\)
c) ta có : I= U/R= 220: 1375/17= 68/25 (A)
=> Q= I2.R.t= (68/25)2.1375/17. 1800=1077120(J)
19 tháng 5 2020
BẠN PHẢI NÓI TRANG CHO MÌNH LÀM CHỨ KHÔNG CHO TRANG THÌ SAO LÀM ĐC
TT
0
Các bạn gải giúp mình nhé
MK
22 tháng 8 2017
XVI. Supply the correct verb form:
1. Mark(eat)..has eaten......dinner already. He is not hungry
2. Beth (write)..has written.......three letters today. She misses her family
3. Yoko and Armand (take)..have taken....the test. Now they can relax
4. Mary and I (be)...have been....to Costa Rica three times. We are familiar with the culture
5. I (drink) .have drunk....six cups of water today
6. Eva (sing).has sung......in a chorus before. Her voice is pretty
7. Chong-Li (get)...has gotten....very good at speaking English. She has practiced a lot
8. Luci (hide)..has hiden.....in the woods. Now her friends will try to find her.
9. It (be)..have been.....a good week so far
10. You (show)..have shown...........that you are a hard worker. Good job!
11. Daisy (wear).has worn..... a dress to work everyday this week
12. Mr. Lee (drive) ...has driven.....from Texas to lowa for the conference. He needs to get some rest before it starts
13. Juan (ride)..has ridden...horses since he was a little boy. It is easy for him
14. Mr and Mrs Sam (become)...have become......grandparents. Their daughter had a baby
15. The movie (begin)...has begun.... Please be quite!
16. Charity (not break)...hasn't broken...her leg on the ski slope. Please dial 911.
17.The city (allow)..has allowed................residents to shoot off fireworks each year on July, 4th
18.The lake (freeze)..has frozen.....solid. Now we can go skating
19. The sun (rise).has risen.....It's time to get up
20. The army (battle)..has battled.......the enemy for two weeks. The soldiers are exhausted
21. The principal (introduce) .has introduced......the new teacher. She seems very nice.
22. Using his telescope, An (see)..has seen...the new teacher. She seems very nice
23. The judge (listen) .has listened.... to all of the envidence. Now he will make a ruling
24. The strawberries (spoil) ..have spoilt..... They should have been kept in the refrigerator
25. He (write) .has written...a book about disease prevention. It'll be published soon
LT
20 tháng 7 2016
Tóm tắt :
Thùng thứ nhất : 28 , 6 lít
Thùng thứ hai : 25,4 lít
Thùng thứ ba :....? lít
Giải
Thùng thứ ba có số lít dầu là :
( 28,6 + 25,4 ) : 2 = 27 ( lít )
Đáp số : 27 lít
Rảnh k hộ !
20 tháng 7 2016
thùng thứ 3 có số lít dầu là:
(28,6+25,4):2=27 lít
cả 3 thùng có số lít dầu là:
28.6+25,6+27=81