1 Clinical Psychologist: Doctorate Degree in Psychology (4 to 7 years of graduate school) 2  Industrial-Organizational Psychologist: Master's Degree (2 to 3 years of graduate school)  Forensic Psychologist: Master's Degree (2 to 3 years of graduate school); a doctoral degree is recommended.
Submarine Propulsion Systems. During World War II, most American submarines were powered by diesel-electric systems. This was a departure from earlier submarine power systems, which were direct drive types, little changed from the earliest boats. In this direct-drive power system, the diesel engine is directly connected to the propeller shaft.
A modern nuclear submarine can stay under water for months at a time. The length of time it can stay submerged is limited by it's food supply onboard.Breathing air can be generated on board by the electrolysis of water. Fresh water is generated from seawater by reverse osmosis.nswer by NeedForSpeed (16). Submarines are capable of producing air, water, and power so the only limitation for submarines is their food supply. Submarines can stay submerged until the food is depleted.