2.0.95/a*15cm=7.84
L=1m,tRA=5.80min,tRB=6.60min,WA=0.78min,WB=0.82min,t0=1.10min
(1)u=L/ t0=100cm/1.10min=90.9cm/min
(2)к=tR′/ t0=(6.60-1.10)/1.10=5.00
(3)R=2(tRB-tRA)/(WA+WB)=2(6.60-5.80)/(0.78+0.82)=1
(4)neff =16(tRA′/WA)2=16×〔(5.80-1.10)/0.78〕2=581
Heff =L/neff=1/581=1.72mm
(5)R1/R2= √L1 /√L2 1/1.5= √1m/√L2 L2=2.25
(6)tRB=2.25×6.60min=14.85min