parts
In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million (ppm, 10−6), parts-per-billion (ppb, 10−9), parts-per-trillion (ppt, 10−12) and parts-per-quadrillion (ppq, 10−15). This notation is not part of the International System of Units (SI) system and its meaning is ambiguous.
View More On Wikipedia.org
View More On Wikipedia.org
Creating content since 2001. Untold Media.
Newest Plumbing Threads
-
Running copper pipework above / across a Gas boiler?
- Started by kristeva
- Replies: 1
-
Installing pipework to avoid airlocks
- Started by Matt0029
- Replies: 1
-
-
-
SPorcelanosa KRION Attica screen 1.2m, anyone?
- Started by Sebastian T
- Replies: 0
-
Cistern filling one third of the way
- Started by dwaindigital
- Replies: 3
-
Boiler losing pressure only on central heating- Started by SnosRap75
- Replies: 6
-
tanking. Is it ok to just seal everything with plastic.
- Started by Staggersandfalls
- Replies: 3
-
Pop quiz, does anyone recognise this radiator valve?
- Started by dimuc
- Replies: 3
-
SUsing coil to clear pipe leading to gutter
- Started by Sonya K
- Replies: 1
-
Replacing outdoor P-Trap Gully with Bottle Gully
- Started by DIwhYdidIstartThis
- Replies: 0
-
-
-
-