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How to Raise Heavy Objects Underwater

How to Raise Heavy Objects Underwater

Lifting underwater One litre (a quart) of water weighs 1 kg (2 pounds). If you can displace this amount of water with 1 L (1 quart) of air underwater, you will obtain about 1 kg (2 pounds) of lift. Any open-ended vessel can be used as a lifting device provided you can attach a line […]