Fiz

1. Drgania F =−kx k 20 = m x t= Acos 0 t  kx 2 E p= 2 mV 2 Ek = 2 kA 2 E c= E k E p= 2 0 =2 f ∂x v t = ∂t ∂v a t= ∂t 2. Drgania tłumione − t x t= Ae cos ' t= A ' cos ' t 2 ' =   0−2 2 2 T'= = 0 '  20−2 2. Fale =vT 2 k=  2 = T  v= k x t 2 y =Asin  kx−t=Asin 2  − = Asin  x−vt   T  2 F v =  m = l 4. Dźwięk I W =10log  [ db ] , I 0 =10 −12 2 I0 m 5. prąd Q C I= =A t s U R=const U , I = I I =V u neS R=R 0 1 T  W Q U2 P= = U = IU =I 2 R= t t R eL J −19 V u= E = , e=1,6∗10 mu ne L=u l t= Vu 6. Pole magnetyczne F Lor =qvBsin v , B F Lor =qEqV × B F =Il ×B  0 2I B= 4 r B H= 0 W =F d W = q U AB IN B= 0  r l

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