Reciprocal meter

A reciprocal meter is a device that measures the reciprocal of a quantity. The reciprocal of a quantity is the number you get when you divide 1 by that quantity. For example, the reciprocal of 2 is 0.5, and the reciprocal of 3 is 0.333. Reciprocal meters are used in a variety of applications, including … Read more

Data shadow

A data shadow is a copy of data that exists in a separate location from the original data. Data shadows are created for various reasons, such as to provide a backup in case the original data is lost or to allow access to the data by people who are not authorized to access the original … Read more


Matter is anything that has mass and occupies space. It is the physical substance of which the universe is composed. Everything that exists — from the smallest particle to the largest galaxy — is made of matter. What is a matter in chemistry? In chemistry, matter is anything that has mass and occupies space. This … Read more