$4$

Multiple Choice $1$ point

Which velocity is used to calculate the mass flowrate $m^{}=AV$ for a nonuniform velocity profile?

V

$\frac{?}{\text{b}\text{a}\text{r}}(V)$

$V_{\text{m}\text{a}\text{x}}$

$5$

Multiple Choice $1$ point

For a circular pipe with radius $R,$ the mass flowrate $m^{}=q,-$

$V(R^2)$

$V(2R)$

$V(R^2)$

$6$

Multiple Choice $1$ point

The linear momentum equation is valid for a $q,$ coordinate system.

both fixed and accelerating

accelerating

fixed