Ascuba diver's air tank contains oxygen, helium, and nitrogen at a total pressure of 205 atmospheres. the partial pressure of nitrogen is 143 atmospheres, and the partial pressure of helium is 41 atmospheres. what is the partial pressure of oxygen in the tank?

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

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