Consider volume V with incoming and outgoing flows. The fluid cannot be considered incompressible. Which of the following variations of continuity equation can be used to describe the situation?多项选择题
A
a. ρ1w1A1 + ρ2w2A2 = ρ3w3A3
B
b. qv,1 + qv,2 = qv,3
C
c.
D
d.
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