... 24 cos = = = 0,96 = -> 25R = 12Z => 25 Z Z Cõu 16: Gii: T R2 = r2 = 625R2 = 144 ( 4R2 + ZL2 + ZC2 2ZLZC) = 144 (4R2 + ZL2 + ZC2 2R2) = 288R2 + 144 ZL2 + 144 ZC2 R2 ZC => 144 ZC4 337R2ZC2 + 144 R4 ... Cõu 47 : Gii : 6,625.10 34. 3.10 ng nng ca ht W = Wmax = 5 ,49 = 5 ,44 86 MeV = 5 ,45 MeV 0,3.10 10.1,6.10 13 Chn B hc Cõu 48 : Gii: Sau t1= 3T thỡ N 63 N Theo t2 =t1 + 41 4 = 3T +3T => 3T =41 4 ... 4) E5 E4 hc Bc súng ngn nht 51 (nng lng ln nht chuyn t trng thỏi sang trng thỏi 1) E5 E1 13, 13, 54 E5 E1 52 12 3 84 128 Vy Chn A 51 E5 E4 13, 13, 52 42 Bc súng di nht 54 Cõu 44 :...