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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 cm^(2), the velocity of water is 1 ms^(-1) and the pressure is 2000 Pa. The pressure at another point where the cross-sectional area is 5 cm^(2) is : |
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Answer» 1000Pa `a_(1)v_(1)=a_(2)v_(2)` `10xx10^(-4)xx1=5xx10^(-4)xxv_(2)` `v_(2)=2m//s` For horizontal pipe `(P_(1))/p+1/2v_(1)^(2)=(P_(2))/p+1/2v_(2)^(2)` `(2000)/(10^(3))+1/2.(1)^(2)=(P_(2))/(10^(3))+1/2.(2)^(2)` `2+0.5=(P_(2))/(10^(3))+2` `rArrP_(2)=500` pascals. So CORRECT choice is (b). |
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