4. The Mariana trench is in the Pacific Ocean and has a depth of approximately 11,000 m. The density of seawater is approximately 1025 kg/m3. What force would someone experience at such depth?

Explanation:

It is known that relation between pressure and density is as follows.

            P =

where,    P = pressure

      = density

            g = acceleration due to gravity

            h = height

Putting the given values into the above formula as follows.

              P =

                 =

                 = 110495000 Pa

Now, relation between pressure and force is as follows.

                P =

or,            F = PA

                F =

                   =

Thus, we can conclude that a force of can be  experienced at such depth.