What is the name for the negative pressure generator invented by Robert Henderson and used extensively by Phillip Drinker and Louis Agassiz Shaw?
Iron lung Dr Henderson developed the first "ïron lung" in the UK in 1933. Drinker and Shaw used it to treat coal gas poisoning. Drinker and Shaw's earlier American development was used in 1928 in Boston on a child unconscious from respiratory failure.
In calculating the balance of pressure and upthrust which enables an object to float, the force on a given surface of the object is the pressure multiplied by what?
Science
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