Giai Theo t h u y e t Bo, electron t r o n g nguyen tuf h i d r o c6 cac quy dao dCrng K , L , M , N , O, K h i of quy dao dijfng N , electron chuyen ve cac quy dao dCfng ben t r o n g M , L , K Co cac each chuyen sau: N ^ K , N - ^ L , N ^ M , M ^ L , M^K, L^K Tifcfng ufng v d i m o i each chuyen, se eo m o t vach quang Vdy chgn dap an D Cdu 35: T a i m o t ntfi t r e n m a t dat, m o t lac don dao dong dieu hoa T r o n g k h o a n g t h d i gian A t , lac thifc h i e n 60 dao dong toan phan; t h a y doi chieu d a i l a c m o t doan 44 cm t h i cung t r o n g khoang thcfi gian A t ay, no thtfc h i # n 50 dao dong toan p h a n Chieu d a i ban dau cua lac l a : A 80 cm B 100 cm C 60 cm Chu k i ban dau cua l^c dcfn: T, - 2K Chu k i luc sau cua iSc dcfn: Tj = 2n^ D 144 cm /, I + 4 g Theo gia t h i e t : T i = 5OT2 C0.27t ^ = ; i j ^ L ± ^ ^ | ^ = g V 36/i = 25Zi + 25.44 O l l Z j = 25.44 / /,+44 g = 25.4 = 100cm Vdy chgn dap an B Cdu 36: T r o n g s i i p h a n hach cua h a t n h a n ^^^'U, goi k la he so n h a n ncftron P h a t bieu nao sau day l a d u n g ? A N e u k = t h i p h a n urng p h a n hach day chuyen k h o n g xay r a B N e u k < t h i p h a n ufng p h a n hach day chuyen xay r a va nSng Itfofng toa r a t a n g n h a n h C Neu k > t h i p h a n ufng p h a n hach day chuyen t i i t r i va c6 the gay n e n b u n g no D Neu k > t h i p h a n ufng p h a n hach day chuyen k h o n g xay r a 42 Giii Chi tilt 06 thi T S D H , C O M6n VSt l(