p=m/V=(m1+m2)/(V1+V2)=(p1*V1+m2)/(V1+m2/p2)=
=(8900*0.4+714)/(0,4+714/7100)=(3560+714)/(0,4+0,1)=8548 кг/м3
p=m/V=(m1+m2)/(V1+V2)=(p1*V1+m2)/(V1+m2/p2)=
=(8900*0.4+714)/(0,4+714/7100)=(3560+714)/(0,4+0,1)=8548 кг/м3