$1\mathrm{.}29$ WP Liquid kerosene flows through a Venturi meter, as shown in Fig. P$1\mathrm{.}29.$ 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 $0\mathrm{.}00122\frac{m^3}{k}g,$ and the acceleration of gravity is $g$

$=9\mathrm{.}81\frac{m}{s^2}.$