Equation of continuity: speed of flow where the cross-section changes

1. A.
   $\frac{R^2r^2}{n}V$
2. B.
   $\frac{R^2v}{nr^2}$
3. C.
   $\frac{nr^2}{R^2}V$
4. D.
   $\frac{nR^2}{r^2}V$

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1. A.
   $g\sqrt{\frac{V_1}{V}}$
2. B.
   $d\sqrt{\frac{V}{V_1}}$
3. C.
   $\frac{dV}{V_1}$
4. D.
   $\frac{V_1}{dV}$

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1. A.
   $\frac{V}{9}$
2. B.
   $\frac{V}{3}$
3. C.
   3 V
4. D.
   9 V

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1. A.
   $0.1\text{ }m/s$
2. B.
   $1\text{ }m/s$
3. C.
   $10\text{ }m/s$
4. D.
   $100\text{ }m/s$

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1. A.
   $d\sqrt{\dfrac{V}{V_1}}$
2. B.
   $d\sqrt{\dfrac{V_1}{V}}$
3. C.
   $\dfrac{dV}{V_1}$
4. D.
   $\dfrac{dV_1}{V}$

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1. A.
   $v$
2. B.
   $2v$
3. C.
   $3v$
4. D.
   $4v$

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