Why can’t ships go to the bottom of the sea?

Joe from Cammell Laird heats up an empty Coke can to demonstrate why ships can't travel to the ocean floor without being crushed!

When you’re on dry land there’s pressure all around from the air but because it’s equal to the pressure inside our bodies, we don’t notice it. But at a kilometre under sea level, the pressure is 1,500 pounds per square inch. That’s like the weight of a small car pushing on every square inch. So you can see how even machines have to be incredibly tough to be able to withstand that pressure without crumpling like an old pop can.

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This video is part of Sean’s Science Around Ships – a Fun Kids series about ships and how they work. Filmed with support from Cammell Laird.

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