Although the same diameter, the Mark 14 was longer, at 20 ft 6 in (6.25 m), and therefore incompatible with older submarines' 15 ft 3 in (4.65 m) torpedo tubes. The Mark 14 was designed at the Naval Torpedo Station (NTS), Newport, beginning in 1922. It had a fairly small warhead and was intended to explode beneath the keel where there was no armor.
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A quantum dot (QD) is a crystal of semiconductor material whose diameter is on the order of several nanometers-a size which results in its free charge carriers experiencing quantum confinement in all three spatial dimensions.s the confinement energy depends on the quantum dots size, both absorption onset and fluorescence emission can be tuned by changing the size of the quantum dot during its synthesis. The larger the dot, the redder (lower energy) its absorption onset and fluorescence spectrum.