This activity looks at some of work of a submarine engineer. A submarine engineer needs to keep the submarine operational and safe, from the life support systems to the electronics and the buoyancy systems. Keeping the submarine at the right depth is essential for submarine operations. This is done using the buoyancy control system, which change the balance of air and water in the ballast tanks. More water and the submersible sinks. More air and it rises.
You will learn about the principles of buoyancy and especially neutral buoyancy in this task. Divers, submersibles and submarines alter the air levels in their buoyancy systems to change their density. In this challenge, you will need to create a neutrally buoyant pen lid submarine!
Can you experiment with different factors that might affect how the pen lid floats and sinks? Does the size of the bottle make any difference or how full it is with water? Why might this be the case?
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