Calculate the absolute pressure at the bottom of a lake a...
Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^3 kgm-3 and the air above is at a pressure of 101.3 kPa.
[Take g = 9.8 ms-2]
422.7
220.14
464.53
321.74
Correct answer is A
h=32·8m, p= 1×103kgm−3
g=9·8 ms−2 , Pa=101·3KPa
PT= ?
P=hpg
⇒32·8×1×103×9·8=321440 Pa
⇒321·44KPa
⇒ PT =321.44+101.3
;PT=422·7KPa