A femtogram (fg) is a metric unit of mass in the International System of Units (SI). It represents one quadrillionth of a gram or 10^-15 grams. The metric system is a decimal-based system of measurement used worldwide, and it is particularly useful for expressing extremely small quantities of mass.
To provide context for the size of a femtogram:
Femtograms are primarily used in advanced scientific and technical fields, particularly in situations where measuring the tiniest quantities of substances or particles is critical. Some common applications of femtograms include:
In the United Kingdom, a "quarter" is a term commonly used in the context of weight or mass, especially in agricultural and trade settings. A "quarter" in the UK refers to a quarter of a hundredweight (cwt).
In the United Kingdom:
1 quarter (UK) = 28 pounds (lbs)
So, when you see "quarter" used in the context of weight or mass in the UK, it generally means 28 pounds. This term is frequently used in the sale and trade of agricultural products and livestock, where quantities are often expressed in multiples of quarters. It's important to note that the UK quarter is different from the US quarter, which is 25 pounds.