Submarines can get to as big as a car to two times as big as a football field.
Why a submarine floats
Buoyancy that is why a submarine floats.
Buoyancy is its ability to float and to sink, depending on its density.
The submarine has tanks that let water go in and the submarine sinks.
And it can let the water go out so the submarine can float.
Uvula.
Uvula is a tissue that helps food and water to not go through your nose and it helps swallow you food.
When your food is getting digested acid helps it digest.
The acid in your stomach does not digest your stomach because your stomach is surrounded by mucus.
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