User:LinguisticDemographer/Draft

List of hundreds of England and Wales

List of Welsh towns twinned with a Breton town

List of places in Pembrokeshire (categorised)

Region:see ISO 3166-1 alpha-2 Type:city(pop), city, airport, mountain, isle, waterbody, landmark, forest

(Abertawe, "mouth of the Tawe")



This is the Carman equation:

$$S=\cfrac{7d}{\rho\,(1-\epsilon\,)}\sqrt{\dfrac{\epsilon\,^3\pi\,\delta\,P}{l\eta\,Q}}$$

where:
 * S is specific surface, m2·kg-1
 * d is the cylinder diameter, m
 * ρ is the sample particle density, kg·m-3
 * ε is the volume porosity of the bed (dimensionless)
 * δP is the pressure drop across the bed, Pa
 * l is the cylinder length, m
 * η is the dynamic viscosity, Pa·s
 * Q is the flowrate, m3·s-1