| X E M L Ạ I C H Ủ Đ Ề |
| Cuong B10 |
Neu ai co thac mac ve phan dien va giao thoa cung nhu Quang cu gui cau hoi cho yoi ban se co cau tra loi som nhat
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| The Leader |
Xin loi, cho hoi ban hoc lop may vay?
Neu ban hoc lop 12, tuc la nam nay thi dai hoc thi tai sao ban khong tham gia nhom on thi khoi A, lien lac voi Hoa tomorrow_neverdie@yahoo.com hoac Ami_HongNhung@hotmail.com .
Rat cam on ve thanh y cua ban!!! |
| Cuong B10 |
Tai sao The leader Lai quang cao nhieu nhu the . Cam on minh se tham gia
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| hoangchunso |
toi cunh rat to mo do,cuong b10 hoc lop 12? |
| Cuongb10 |
u the tho sao |
| 1579 |
cuong b10 oi nho ban giai gium toi bai nay nhe.toi nghi chac la de voi ban vi la kien thuc co ban ma, nhung toi hoc ko dc ro phan nay lam cam on ban nhieu
phan cam cua 1 may phat dien xoay chieu gom 3 cap cuc quay voi van toc 1000vong/phut. Phan ung gom 6 cuon day noi tiep voi nhau tren roto ,dien tro ko dang ke. Tu thong cuc dai qua moi vong day la 0,005wb suat dien dong hieu dung la 60v.
tinh so vong day cua moi cuon va lap bieu thuc hieu dien the o hai cuc cua may.
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| Cuongb10 |
Xin loi 1579 phai de ban goi dien den minh minh xe co gang giai giup ban , thinh thoang may minh bi loi nhieu luc dang viet nhu the nay thi bi bat mang , may bi vi r ma ban co the cho minh so dien thoai minh se goi cho ban va giai bai nay cho ban . Bye chuc ban hoc gioi nho cho ca ten that de minh con gap |
| 1579 |
Cuong oi, neu ban lam duoc bai do roi sao ko post len cho moi nguoi cung xem.Toi dam ca rang cung dang con 1 so nguoi co nhung thac mac nhu toi vay.
con ve chuyen xin so dien thoai thi hen ban khi khac vay.Ten thi ban cu goi toi la 1579 cung duoc ma.
A, khi nao co nhung bai ma toi ko hieu duoc, toi co the hoi truc tiep ban qua dien thoai duoc ko.cam on ban nhieu
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| Admin |
Cho minh hoi chut ve` giao thoa di nha':
Hom truoc truong minh thi thu mon Ly, co cau hoi ve` tim van sang, van toi. Moi nguoi (ke ca cac thay) cu' cai nhau la` "bac van toi" va` "thu' van toi" la` khac nhau.
Vi' du. nhu de` bieu tinh vi tri van toi bac 5. Tui lam la`:
x(t)=(2k+1).i/2, cho k=4. Vay la` dung hay sai ? Mot so thay cho dung, mot so thay lai cho sai. Ca~i nhau tum lum, ma` van toi bac 5 voi lai van toi thu 5 khac nhau a` ?
Tra loi giup minh nha' |
| Admin |
Theo minh nghi ban da lam dung,va bac van toi va thu van toi cung chi la mot thoi.
Nhung ban nen chu y den 2 cong thuc sau:
x=(2k+1).i/2 (1)
x=(2k-1).i/2 (2)
Doi voi cong thuc 1,tinh van toi bac 5 thi ban dung k=4.
Con doi voi cong thuc 2 thi ban dung k=5.
Ok chu.Chuc ban thanh cong
Bye....
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