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Liquid kerosene flows through a venturi meter, as shown in fig. p1.36. the pressure of the kerosene in the pipe supports columns of kerosene that differ in height by 12 cm. determine the difference in pressure between points a and b, in kpa. does the pressure increase or decrease as the kerosene flows from point a to point b as the pipe diameter decreases? the atmospheric pressure is 101 kpa, the specific volume of kerosene is 0.00122 m3/kg, and the acceleration of gravity is g 5 9.81 m/s2.
Liquid kerosene flows through a venturi meter, as shown in fig. p1.36. the pressure of the kerosene in the pipe supports columns of kerosene that differ in height by 12 cm. determine the difference in pressure between points a and b, in kpa. does the pressure increase or decrease as the kerosene flows from point a to point b as the pipe diameter decreases? the atmospheric pressure is 101 kpa, the specific volume of kerosene is 0.00122 m3/kg, and the acceleration of gravity is g 5 9.81 m/s2.
we knowPa=Patm+dgh+dglhere Pa is pressure in pipe with higher level of liquidPatm is atmospheric pressured is densityg is gravitational constanth is height of lower liquidl is difference is height of higher liquidSo Pb= Patm+dghhere Pb is pressure lower level pipesoPdiff=Pb-PaPdiff=-dglWe knowDensity of kerosene is the reciprocal of it’s specific volumeso d=1/v=1/0.00122=820kg/m3as g=9.81 and l=12cmPdiff= - 820*9.81*12/100Pdiff = -965.304 PaNegative sign shows pressure decreases as the kerosene flows from point Ato point B as the pipe diameter decreases....
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