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Subbing physics

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A robotic sub is submergin with an acceleration of .25m/s² until reaching a constant velocity of 6 m/s. On the way down a leak is created by a shark biting the hull at 10,000m under the surface of the water that fills the hull of the sub by 1 m³/min. Assume the sub is cylindrical with a radius of .5m and 2m long with control .5 m above the bottom of the hull. At what time does the sub short out? If the sub crumples by pressure on the outside at the exact moment that the water shorts out the electronics, how many pascals of pressure could the sub stand up to?

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