1.P=m1V1
2.P=V2m1+Vm2
3.m1V1=V2m1+Vm2
4.V=m1(V1-V2)/m2=0.01*(600-400)/0.2= =2/0.2=10м/с
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1.P=m1V1
2.P=V2m1+Vm2
3.m1V1=V2m1+Vm2
4.V=m1(V1-V2)/m2=0.01*(600-400)/0.2= =2/0.2=10м/с