Neutral Buoyancy - History

History

The mathematician Archimedes discovered much of how buoyancy works more than 2000 years ago. In his research, Archimedes discovered that an object is buoyed up by a force equal to the weight of the water displaced by the object. In other words, an inflatable boat that displaces 100 pounds (45 kilograms) of water is buoyed up by that same weight of support. An object that floats in the water is known as being positively buoyant. An object that sinks to the bottom is negatively buoyant, while an object that hovers at the same level in the water is neutrally buoyant. Scientists later discovered ways to manipulate buoyancy and developed equipment such as the life jacket, which is filled with compressed air and helps to lower a person's average density, assisting in floating and swimming, as well as certain diving equipment (including submarines and submersibles) which have air chamber similar to swim bladders to regulate depth.

Read more about this topic:  Neutral Buoyancy

Famous quotes containing the word history:

    All objects, all phases of culture are alive. They have voices. They speak of their history and interrelatedness. And they are all talking at once!
    Camille Paglia (b. 1947)

    You that would judge me do not judge alone
    This book or that, come to this hallowed place
    Where my friends’ portraits hang and look thereon;
    Ireland’s history in their lineaments trace;
    Think where man’s glory most begins and ends
    And say my glory was I had such friends.
    William Butler Yeats (1865–1939)

    I saw the Arab map.
    It resembled a mare shuffling on,
    dragging its history like saddlebags,
    nearing its tomb and the pitch of hell.
    Adonis [Ali Ahmed Said] (b. 1930)