Physics 1307 Quiz 5 Solution A lake in the far north Yukon is covered with a 1.75m thick layer of ice. Find the absolute pressure and the gauge pressure at a depth of 2.50 m in the lake.
1.75 m
2.50 m
P=P 0 g h P=Patm P iceP water P=1.013×105 Pa0.92×10 3 kg/ m3 9.8 m/s 2 1.75 m10 3 kg/ m3 9.8 m /s 2 2.50 m P=1.41×10 5 Pa The above pressure is the absolute pressure, the gauge pressure is the pressure above the atmospheric one, thus: 4
PG =4.03×10 Pa
Useful equations:
P=P0 g h water=10 3 kg/ m3 ice =0.92×10 3 kg/ m3