Water is in streamline flow along a horizontal pipe with nonuniform cross-section. At a point in...

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Water is in streamline flow along a horizontal pipe with nonuniform cross-section. At a point in the pipe where the area of cross-section is \( 10 \mathrm{~cm}^{2} \), the velocity of water is \( 1 \mathrm{~ms}^{-1} \) and the pressure is \( 2000 \mathrm{~Pa} \). The pressure at another point where the cross-sectional area is \( 5 \mathrm{~cm}^{2} \) is
[KCET 2010]
(a) \( 4000 \mathrm{~Pa} \)
(b) \( 2000 \mathrm{~Pa} \)
(c) \( 1000 \mathrm{~Pa} \)
(d) \( 500 \mathrm{~Pa} \)
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