Homework SourseThe HMS Terror was recently found off the coast of Nunavut
. The HMS Terror was recently found off the coast of Nunavut (Hinchey 2016). It was found submerged in about 24 m of water (Hinchey 2016). What is the maximum pressure the vessel was subjected to?
Solution
The density of sea water is 1.03 X 10 3 kg/m3 and the atmospheric pressure is 1.01 x 105 N/m2.
Pfluid = r g h
where
Pfluid = (1.03 x10 3 kg/m3) (9.8 m/s2) (24 m) = 2.422 x 105 Newtons/m2
If the container is open to the atmosphere above, the added pressure must be included if one is to find the total pressure on an object. The total pressure is the same as absolute pressure on pressure gauges readings, while the gauge pressure is the same as the fluid pressure alone, not including atmospheric pressure.
Ptotal = Patmosphere + Pfluid = (1.01 x 105) + (2.422 x 105 ) Pa = 343.2 x 103 N/m2
Therefore maximum pressure the vessel was subjected to 343.2 x 103
