Pressure of a liquid column depends on the cross section area of the column. True False
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In a horizontal tube with area of cross-section $A_{1}$ and $A_{2}$ as shown in fig, liquid is flowing with velocities $v_{1}$ and $v_{2}$ respectively. The difference in the level of the liquid in the two vertical tubes is $h$. Then :(a) the volume of the liquid flowing through the tube in unit time is $A_{1} v_{1}$ (b) $v_{2}-v_{1}=\sqrt{2} h$ (c) $v_{2}^{2}-v_{1}^{2}=2 g h$ (d) the energy per unit mass of the liquid is the same in both sections of the tube
A liquid $(\rho=1.65 \mathrm{g} /$ $\mathrm{cm}^{3}$ ) flows through a horizontal pipe of varying cross section as in Figure $\mathrm{P9} .36$ In the first section, the cross-sectional area is 10.0 $\mathrm{cm}^{2}$ the flow speed is $275 \mathrm{cm} / \mathrm{s},$ and the pressure is $1.20 \times$ $10^{5}$ Pa. In the second section, the cross-sectional area is 2.50 $\mathrm{cm}^{2}$ . Calculate the smaller section's (a) flow speed and (b) pressure.
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