7. 2.7 2.7 For the great depths that may be en- countered in the ocean the...

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7. 2.7 2.7 For the great depths that may be en- countered in the ocean the compressibility of sea- water may become an important consideration. (a) Assume that the bulk modulus for seawater is constant and derive a relationship between pressure and depth which takes into account the change in fluid density with depth. (b) Make use of part (a) to determine the pressure at a depth of 6 km assuming seawater has a bulk modulus of 2.3 x 10 Pa, and a density of 1030 kg/m at the surface. Compare this result with that ob- tained by assuming a constant density of 1030 kg/m 7. 2.7 2.7 For the great depths that may be en- countered in the ocean the compressibility of sea- water may become an important consideration. (a) Assume that the bulk modulus for seawater is constant and derive a relationship between pressure and depth which takes into account the change in fluid density with depth. (b) Make use of part (a) to determine the pressure at a depth of 6 km assuming seawater has a bulk modulus of 2.3 x 10 Pa, and a density of 1030 kg/m at the surface. Compare this result with that ob- tained by assuming a constant density of 1030 kg/m