A vertical tube open to the atmosphere holds two immiscible fluids: 0.18 m of kerosene (ρ=820kgm−3) above 0.30 m of water.
Use g=9.8ms−2 and atmospheric pressure P0=1.01×105Pa.
(a) Calculate the gauge pressure at the bottom of the water layer.
(b) Determine the absolute pressure at that same point.