<span>Решение. 1. N-m*g=m*a; N=m*(g+a) N=70*(9,8+40)=70*49,8</span>
M(O2)=16*2=32
n=16/32=0.5
N=6.02*10^23*0.5=3.01
Дано n1=1,33 a1=45 n2=1 a2- ?
n1*sina1=n2*sina2
sina2=n1*sina1=1,33*1,41/2=0,937
a2=70 градусов
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