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Naily [24]
3 years ago
11

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.
Physics
1 answer:
castortr0y [4]3 years ago
4 0
We know 
Pa=Patm+dgh+dgl
 here Pa is pressure in pipe with higher level of liquid
 Patm is atmospheric pressure
 d is density
 g is gravitational constant
 h is height of lower liquid
 l is difference is height of higher liquid
 So Pb= Patm+dgh
 here Pb is pressure lower level pipe
 so 
 Pdiff=Pb-Pa
 Pdiff=-dgl
 We know 
 Density of kerosene is the reciprocal of it’s specific volume
 so d=1/v=1/0.00122=820kg/m3
 as g=9.81 and l=12cm
 Pdiff= - 820*9.81*12/100
 Pdiff = -965.304 Pa

 Negative sign shows pressure decreases as the kerosene flows from point A
to point B as the pipe diameter decreases.
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