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Physics: Principles and ProblemsChapter 11:
Energy and Its ConservationProblem of the Week![](/sites/dl/free/0098458137/193800/ch11_title.gif) (0.0K) | Nuclear
Navies
Put to sea in 1955, the USS Nautilus became the first nuclear-powered
submarine. At the end of the Cold War, in 1989, there were over
400 fission-driven submarines. Presently, there are fewer than
200 such submarines active. Russia and USA have a few surface
nuclear ships including carriers, cruisers, and icebreakers.
| There
are six nuclear submarines that now lie abandoned on the ocean
floor: two American and four Soviet. ![](/sites/dl/free/0098458137/193800/lilGuy.gif) (0.0K)
| Akula
Class
Thirteen Akula class submarines are active on the world's seas,
six in the Northern Fleet and seven in the Pacific Fleet. A
190-MW nuclear reactor powers an Akula, generating a propeller
power of 43 000 hp. During the 1980s, the Akula class was one
of the quietest and quickest submarines in the world.
| ![](/sites/dl/free/0098458137/193800/POWproblem1.gif) (0.0K) | Calculate
the efficiency of the nuclear reactor to transform nuclear energy
into propulsion. | | ![](/sites/dl/free/0098458137/193800/POWproblem2.gif) (0.0K) | Assume
that energy transformation from propulsion to motion is a 100%
efficient, calculate the time required for the submarine to
attain 35 knots. Where might most of the energy be "lost"? | ![](/sites/dl/free/0098458137/193800/gutter.gif) (0.0K) | ![](/sites/dl/free/0098458137/193800/gutter.gif) (0.0K) | ![](/sites/dl/free/0098458137/193800/gutter.gif) (0.0K) | ![](/sites/dl/free/0098458137/193800/gutter.gif) (0.0K) | ![](/sites/dl/free/0098458137/193800/gutter.gif) (0.0K) |
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