This one's giving me a headache. Could soomeone spare from the shame that my friends think that I'm no good a calculus?
Thanks, here we go...
A circular window on salt-water submarine has a radius of 3ft. The window is "reclining" so that the occupants can see above them, and it makes an angle of 30 degrees with the horizontal. The maximum fluid force this window can withstand is 300,000 lbs. What is the maximum depth to which this submarine can submerge.