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 skeletal muscle that resides in the trunk of the body and separates the thoracic and abdominal cavities from one another. Its function occurs during breathing, where it contracts to enlarge the thoracic cavity and reduce the intrathoracic pressure, so that the lungs may expand and fill their alveoli with air.