4. At a depth of 10.9 km, the Challenger Deep in the Marianas Trench of the Paci

Question

4. At a depth of 10.9 km, the Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest known point in the Earth’s seabed hydrosphere. Yet, in 1960, Donald Walsh and Jacques Piccard reached the Challenger Deep in the Bathyscaphe Trieste. On March 26, 2012, James Cameron also reached the Challenger deep in his Deepsea Challenger. Assuming that seawater has a uniform density of 1024 kg/m3, what is approximately the hydrostatic pressure (in atm) that the vessels had to withstand at that depth?

6. An object of weight W sits on a given piston. If a force F = 5 N is required to keep the object in place. With d1 = 0.25 m and d2 = 25 m, what is the mass of the object that the force can support?

Explanation / Answer

Q4.
pressure = rho * g * depth
So,
pressure = 1024 kg/m^3 * 9.8m/s/s * 10900 m
= 1.09x10^8N/m^2

1 atm = 1.01 * 10^5 N/m^2 so this is equivalent to 1084 atm

Pls post other questions separately.

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