A) \[\frac{V{{R}^{2}}}{{{n}^{3}}{{r}^{2}}}\]
B) \[\frac{{{V}^{2}}R}{nr}\]
C) \[\frac{V{{R}^{2}}}{{{n}^{2}}{{r}^{2}}}\]
D) \[\frac{V{{R}^{2}}}{n{{r}^{2}}}\]
Correct Answer: D
Solution :
[d] mass flow rate equal at both cross sections \[\overset{o}{\mathop{{{m}_{1}}}}\,=\overset{o}{\mathop{{{m}_{2}}}}\,\] \[{{\rho }_{1}}{{V}_{1}}={{\rho }_{2}}{{V}_{2}}\] \[{{V}_{1}}={{V}_{2}}\] \[{{\rho }_{1}}\,={{\rho }_{2}}\]when liquid is same \[{{A}_{1}}{{V}_{1}}={{A}_{2}}{{V}_{2}}\] \[\pi {{R}^{2}}V=n\pi {{r}^{2}}{{V}_{2}}\] \[{{V}_{2}}=\frac{V{{R}^{2}}}{n{{r}^{2}}}\]You need to login to perform this action.
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