Ex nihilo is a Latin phrase meaning out of nothing,â which often appears in conjunction with the concept of creation, as in creatio ex nihilo, meaning creation out of nothing.â Not only do scientists think the Universe was created out of nothing, or that nothing existed before the singularity, but even Creationists, those who believe God created ...
There are two main categories of diaphragm valves: one type seals over a weir (saddle) and the other (sometimes called a full bore or straight-way valve) seals over a seat.
The diaphragm is a muscle and when it expands, it creates a negative pressure in the lungs, this make the air outside (which has a relative positive pressure) want to flow int â¦ o the lungs and maintain equilibrium. When the diaphragm contracts it creates a positive pressure in the lungs and the air is forced out.