During a test dive in 1939, prior to being acceptedby the U.S. Navy, the submarine Squalus sank at a point where thedepth of water was 73.0 m. The temperature was 27.0 C at the surfaceand 7.0 C at the bottom. The density of seawater is 1030 kg/m3.(a) A diving bell was used to rescue 33 trapped crewmen from theSqualus. The diving bell was in the form of a circular cylinder 2.30 mhigh, open at the bottom and closed at the top. When the diving bellwas lowered to the bottom of the sea, to what height did water risewithin the diving bell? (Hint: Ignore the relatively small variation inwater pressure between the bottom of the bell and the surface of thewater within the bell.) (b) At what gauge pressure must compressedair have been supplied to the bell while on the bottom to expel all thewater from it?
During a test dive in 1939, prior to being accepted
by the U.S. Navy, the submarine Squalus sank at a point where the
depth of water was 73.0 m. The temperature was 27.0 C at the surface
and 7.0 C at the bottom. The density of seawater is 1030 kg/m3.
(a) A diving bell was used to rescue 33 trapped crewmen from the
Squalus. The diving bell was in the form of a circular cylinder 2.30 m
high, open at the bottom and closed at the top. When the diving bell
was lowered to the bottom of the sea, to what height did water rise
within the diving bell? (Hint: Ignore the relatively small variation in
water pressure between the bottom of the bell and the surface of the
water within the bell.) (b) At what gauge pressure must compressed
air have been supplied to the bell while on the bottom to expel all the
water from it?
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