Here is how I attempt to solve it:
B=buoyant force, r(w) = density of water, r(a) = density of air, V=volume of gas, h=depth
Fnet = B - Fg = r(w)gh - r(a)gV = 1000*9.81*h - 2.40*9.81*10 = 981h - 235.44
and.. since the forces vary with depth,
W = integral of (981h -235.44) from 0 to...
Since there is no area mentioned, I am assuming I won't have to deal with pressures.
So, if I calculate the net unbalanced force (Buoyant force - Gravitational = Force Needed to Submerge) and multiply it by the depth, I should get the work required. However, the buoyant force is different at...
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